diff --git a/lib/libc/gen/libc_interposing_table.c b/lib/libc/gen/libc_interposing_table.c
--- a/lib/libc/gen/libc_interposing_table.c
+++ b/lib/libc/gen/libc_interposing_table.c
@@ -49,7 +49,6 @@
 interpos_func_t *
 __libc_interposing_slot(int interposno)
 {
-	/* XXX: forward compat. Remove after 15.0-RELEASE. */
 	if (__libc_interposing[interposno] == NULL)
 		return (__libsys_interposing_slot(interposno));
 	return (&__libc_interposing[interposno]);
diff --git a/lib/libc/gen/sleep.c b/lib/libc/gen/sleep.c
--- a/lib/libc/gen/sleep.c
+++ b/lib/libc/gen/sleep.c
@@ -56,7 +56,7 @@
 	time_to_sleep.tv_sec = seconds;
 	time_to_sleep.tv_nsec = 0;
 	if (((int (*)(const struct timespec *, struct timespec *))
-	    (*__libsys_interposing_slot(INTERPOS_nanosleep)))(
+	    (*__libc_interposing_slot(INTERPOS_nanosleep)))(
 	    &time_to_sleep, &time_remaining) != -1)
 		return (0);
 	if (errno != EINTR)
diff --git a/lib/libc/gen/usleep.c b/lib/libc/gen/usleep.c
--- a/lib/libc/gen/usleep.c
+++ b/lib/libc/gen/usleep.c
@@ -46,7 +46,7 @@
 	time_to_sleep.tv_nsec = (useconds % 1000000) * 1000;
 	time_to_sleep.tv_sec = useconds / 1000000;
 	return (((int (*)(const struct timespec *, struct timespec *))
-	    (*__libsys_interposing_slot(INTERPOS_nanosleep)))(&time_to_sleep,
+	    (*__libc_interposing_slot(INTERPOS_nanosleep)))(&time_to_sleep,
 	    NULL));
 }
 
diff --git a/lib/libc/include/libc_private.h b/lib/libc/include/libc_private.h
--- a/lib/libc/include/libc_private.h
+++ b/lib/libc/include/libc_private.h
@@ -201,7 +201,6 @@
 interpos_func_t *__libc_interposing_slot(int interposno);
 extern interpos_func_t __libc_interposing[] __hidden;
 interpos_func_t *__libsys_interposing_slot(int interposno);
-extern interpos_func_t __libsys_interposing[] __hidden;
 
 enum {
 	INTERPOS_accept,
diff --git a/lib/libsys/accept.c b/lib/libsys/accept.c
--- a/lib/libsys/accept.c
+++ b/lib/libsys/accept.c
@@ -41,5 +41,5 @@
 accept(int s, struct sockaddr *addr, socklen_t *addrlen)
 {
 	return (((int (*)(int, struct sockaddr *, socklen_t *))
-	    __libsys_interposing[INTERPOS_accept])(s, addr, addrlen));
+	    *(__libc_interposing_slot(INTERPOS_accept)))(s, addr, addrlen));
 }
diff --git a/lib/libsys/accept4.c b/lib/libsys/accept4.c
--- a/lib/libsys/accept4.c
+++ b/lib/libsys/accept4.c
@@ -41,5 +41,6 @@
 accept4(int s, struct sockaddr *addr, socklen_t *addrlen, int flags)
 {
 	return (((int (*)(int, struct sockaddr *, socklen_t *, int))
-	    __libsys_interposing[INTERPOS_accept4])(s, addr, addrlen, flags));
+	    *(__libc_interposing_slot(INTERPOS_accept4)))
+	    (s, addr, addrlen, flags));
 }
diff --git a/lib/libsys/aio_suspend.c b/lib/libsys/aio_suspend.c
--- a/lib/libsys/aio_suspend.c
+++ b/lib/libsys/aio_suspend.c
@@ -42,5 +42,6 @@
 {
 	return (((int (*)(const struct aiocb * const[], int,
 	    const struct timespec *))
-	    __libsys_interposing[INTERPOS_aio_suspend])(iocbs, niocb, timeout));
+	    *(__libc_interposing_slot(INTERPOS_aio_suspend)))
+	    (iocbs, niocb, timeout));
 }
diff --git a/lib/libsys/clock_nanosleep.c b/lib/libsys/clock_nanosleep.c
--- a/lib/libsys/clock_nanosleep.c
+++ b/lib/libsys/clock_nanosleep.c
@@ -43,6 +43,6 @@
 {
 	return (((int (*)(clockid_t, int, const struct timespec *,
 	    struct timespec *))
-	    __libsys_interposing[INTERPOS_clock_nanosleep])(clock_id, flags,
-	    rqtp, rmtp));
+	    *(__libc_interposing_slot(INTERPOS_clock_nanosleep)))
+	    (clock_id, flags, rqtp, rmtp));
 }
diff --git a/lib/libsys/close.c b/lib/libsys/close.c
--- a/lib/libsys/close.c
+++ b/lib/libsys/close.c
@@ -40,5 +40,5 @@
 int
 close(int fd)
 {
-	return (((int (*)(int))__libsys_interposing[INTERPOS_close])(fd));
+	return (((int (*)(int))*(__libc_interposing_slot(INTERPOS_close)))(fd));
 }
diff --git a/lib/libsys/connect.c b/lib/libsys/connect.c
--- a/lib/libsys/connect.c
+++ b/lib/libsys/connect.c
@@ -41,5 +41,5 @@
 connect(int s, const struct sockaddr *addr, socklen_t addrlen)
 {
 	return (((int (*)(int, const struct sockaddr *, socklen_t))
-	    __libsys_interposing[INTERPOS_connect])(s, addr, addrlen));
+	    *(__libc_interposing_slot(INTERPOS_connect)))(s, addr, addrlen));
 }
diff --git a/lib/libsys/creat.c b/lib/libsys/creat.c
--- a/lib/libsys/creat.c
+++ b/lib/libsys/creat.c
@@ -44,7 +44,7 @@
 __creat(const char *path, mode_t mode)
 {
 	return (((int (*)(int, const char *, int, ...))
-	    __libsys_interposing[INTERPOS_openat])(AT_FDCWD, path, O_WRONLY |
-	    O_CREAT | O_TRUNC, mode));
+	    *(__libc_interposing_slot(INTERPOS_openat)))
+	    (AT_FDCWD, path, O_WRONLY | O_CREAT | O_TRUNC, mode));
 }
 
diff --git a/lib/libsys/fcntl.c b/lib/libsys/fcntl.c
--- a/lib/libsys/fcntl.c
+++ b/lib/libsys/fcntl.c
@@ -50,5 +50,5 @@
 	va_end(args);
 
 	return (((int (*)(int, int, ...))
-	    __libsys_interposing[INTERPOS_fcntl])(fd, cmd, arg));
+	    *(__libc_interposing_slot(INTERPOS_fcntl)))(fd, cmd, arg));
 }
diff --git a/lib/libsys/fdatasync.c b/lib/libsys/fdatasync.c
--- a/lib/libsys/fdatasync.c
+++ b/lib/libsys/fdatasync.c
@@ -37,5 +37,6 @@
 int
 fdatasync(int fd)
 {
-	return (((int (*)(int))__libsys_interposing[INTERPOS_fdatasync])(fd));
+	return (((int (*)(int))*(__libc_interposing_slot(INTERPOS_fdatasync)))
+	    (fd));
 }
diff --git a/lib/libsys/fork.c b/lib/libsys/fork.c
--- a/lib/libsys/fork.c
+++ b/lib/libsys/fork.c
@@ -39,5 +39,5 @@
 pid_t
 fork(void)
 {
-	return (((pid_t (*)(void))__libsys_interposing[INTERPOS_fork])());
+	return (((pid_t (*)(void))*(__libc_interposing_slot(INTERPOS_fork)))());
 }
diff --git a/lib/libsys/fsync.c b/lib/libsys/fsync.c
--- a/lib/libsys/fsync.c
+++ b/lib/libsys/fsync.c
@@ -39,5 +39,5 @@
 int
 fsync(int fd)
 {
-	return (((int (*)(int))__libsys_interposing[INTERPOS_fsync])(fd));
+	return (((int (*)(int))*(__libc_interposing_slot(INTERPOS_fsync)))(fd));
 }
diff --git a/lib/libsys/interposing_table.c b/lib/libsys/interposing_table.c
--- a/lib/libsys/interposing_table.c
+++ b/lib/libsys/interposing_table.c
@@ -34,7 +34,7 @@
 
 #define	SLOT(a, b) \
 	[INTERPOS_##a] = (interpos_func_t)b
-interpos_func_t __libsys_interposing[INTERPOS_MAX] = {
+static interpos_func_t __libsys_interposing[INTERPOS_MAX] = {
 	SLOT(accept, __sys_accept),
 	SLOT(accept4, __sys_accept4),
 	SLOT(aio_suspend, __sys_aio_suspend),
diff --git a/lib/libsys/kevent.c b/lib/libsys/kevent.c
--- a/lib/libsys/kevent.c
+++ b/lib/libsys/kevent.c
@@ -43,6 +43,6 @@
 {
 	return (((int (*)(int, const struct kevent *, int,
 	    struct kevent *, int, const struct timespec *))
-	    __libsys_interposing[INTERPOS_kevent])(kq, changelist, nchanges,
-	   eventlist, nevents, timeout));
+	    *(__libc_interposing_slot(INTERPOS_kevent)))
+	    (kq, changelist, nchanges, eventlist, nevents, timeout));
 }
diff --git a/lib/libsys/lockf.c b/lib/libsys/lockf.c
--- a/lib/libsys/lockf.c
+++ b/lib/libsys/lockf.c
@@ -63,8 +63,8 @@
 	case F_TEST:
 		fl.l_type = F_WRLCK;
 		if (((int (*)(int, int, ...))
-		    __libsys_interposing[INTERPOS_fcntl])(filedes, F_GETLK, &fl)
-		    == -1)
+		    *(__libc_interposing_slot(INTERPOS_fcntl)))
+		    (filedes, F_GETLK, &fl) == -1)
 			return (-1);
 		if (fl.l_type == F_UNLCK || (fl.l_sysid == 0 &&
 		    fl.l_pid == getpid()))
@@ -79,5 +79,5 @@
 	}
 
 	return (((int (*)(int, int, ...))
-	    __libsys_interposing[INTERPOS_fcntl])(filedes, cmd, &fl));
+	    *(__libc_interposing_slot(INTERPOS_fcntl)))(filedes, cmd, &fl));
 }
diff --git a/lib/libsys/msync.c b/lib/libsys/msync.c
--- a/lib/libsys/msync.c
+++ b/lib/libsys/msync.c
@@ -41,5 +41,5 @@
 msync(void *addr, size_t len, int flags)
 {
 	return (((int (*)(void *, size_t, int))
-	    __libsys_interposing[INTERPOS_msync])(addr, len, flags));
+	    *(__libc_interposing_slot(INTERPOS_msync)))(addr, len, flags));
 }
diff --git a/lib/libsys/nanosleep.c b/lib/libsys/nanosleep.c
--- a/lib/libsys/nanosleep.c
+++ b/lib/libsys/nanosleep.c
@@ -40,5 +40,5 @@
 nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
 {
 	return (((int (*)(const struct timespec *, struct timespec *))
-	    __libsys_interposing[INTERPOS_nanosleep])(rqtp, rmtp));
+	    *(__libc_interposing_slot(INTERPOS_nanosleep)))(rqtp, rmtp));
 }
diff --git a/lib/libsys/open.c b/lib/libsys/open.c
--- a/lib/libsys/open.c
+++ b/lib/libsys/open.c
@@ -51,6 +51,6 @@
 		mode = 0;
 	}
 	return (((int (*)(int, const char *, int, ...))
-	    __libsys_interposing[INTERPOS_openat])(AT_FDCWD, path, flags,
-	    mode));
+	    *(__libc_interposing_slot(INTERPOS_openat)))
+	    (AT_FDCWD, path, flags, mode));
 }
diff --git a/lib/libsys/openat.c b/lib/libsys/openat.c
--- a/lib/libsys/openat.c
+++ b/lib/libsys/openat.c
@@ -54,5 +54,6 @@
 		mode = 0;
 	}
 	return (((int (*)(int, const char *, int, ...))
-	    __libsys_interposing[INTERPOS_openat])(fd, path, flags, mode));
+	    *(__libc_interposing_slot(INTERPOS_openat)))
+	    (fd, path, flags, mode));
 }
diff --git a/lib/libsys/pdfork.c b/lib/libsys/pdfork.c
--- a/lib/libsys/pdfork.c
+++ b/lib/libsys/pdfork.c
@@ -37,6 +37,7 @@
 pid_t
 pdfork(int *fdp, int flags)
 {
-	return (((pid_t (*)(int *, int))__libsys_interposing[INTERPOS_pdfork])
+	return (((pid_t (*)(int *, int))
+	    *(__libc_interposing_slot(INTERPOS_pdfork)))
 	    (fdp, flags));
 }
diff --git a/lib/libsys/poll.c b/lib/libsys/poll.c
--- a/lib/libsys/poll.c
+++ b/lib/libsys/poll.c
@@ -40,5 +40,5 @@
 poll(struct pollfd pfd[], nfds_t nfds, int timeout)
 {
 	return (((int (*)(struct pollfd *, nfds_t, int))
-	    __libsys_interposing[INTERPOS_poll])(pfd, nfds, timeout));
+	    *(__libc_interposing_slot(INTERPOS_poll)))(pfd, nfds, timeout));
 }
diff --git a/lib/libsys/ppoll.c b/lib/libsys/ppoll.c
--- a/lib/libsys/ppoll.c
+++ b/lib/libsys/ppoll.c
@@ -41,6 +41,6 @@
     timeout, const sigset_t *__restrict newsigmask)
 {
 	return (((int (*)(struct pollfd *, nfds_t, const struct timespec *,
-	    const sigset_t *)) __libsys_interposing[INTERPOS_ppoll])(pfd, nfds,
-	    timeout, newsigmask));
+	    const sigset_t *))*(__libc_interposing_slot(INTERPOS_ppoll)))
+	    (pfd, nfds, timeout, newsigmask));
 }
diff --git a/lib/libsys/pselect.c b/lib/libsys/pselect.c
--- a/lib/libsys/pselect.c
+++ b/lib/libsys/pselect.c
@@ -42,5 +42,5 @@
 {
 	return (((int (*)(int, fd_set *, fd_set *, fd_set *,
 	    const struct timespec *, const sigset_t *))
-	    __libsys_interposing[INTERPOS_pselect])(n, rs, ws, es, t, s));
+	    *(__libc_interposing_slot(INTERPOS_pselect)))(n, rs, ws, es, t, s));
 }
diff --git a/lib/libsys/read.c b/lib/libsys/read.c
--- a/lib/libsys/read.c
+++ b/lib/libsys/read.c
@@ -41,5 +41,5 @@
 read(int fd, void *buf, size_t nbytes)
 {
 	return (((ssize_t (*)(int, void *, size_t))
-	    __libsys_interposing[INTERPOS_read])(fd, buf, nbytes));
+	    *(__libc_interposing_slot(INTERPOS_read)))(fd, buf, nbytes));
 }
diff --git a/lib/libsys/readv.c b/lib/libsys/readv.c
--- a/lib/libsys/readv.c
+++ b/lib/libsys/readv.c
@@ -42,5 +42,5 @@
 readv(int fd, const struct iovec *iov, int iovcnt)
 {
 	return (((ssize_t (*)(int, const struct iovec *, int))
-	    __libsys_interposing[INTERPOS_readv])(fd, iov, iovcnt));
+	    *(__libc_interposing_slot(INTERPOS_readv)))(fd, iov, iovcnt));
 }
diff --git a/lib/libsys/recv.c b/lib/libsys/recv.c
--- a/lib/libsys/recv.c
+++ b/lib/libsys/recv.c
@@ -44,6 +44,6 @@
 	 */
 	return (((ssize_t (*)(int, void *, size_t, int,
 	    struct sockaddr *, socklen_t *))
-	    __libsys_interposing[INTERPOS_recvfrom])(s, buf, len, flags,
-	   NULL, NULL));
+	    *(__libc_interposing_slot(INTERPOS_recvfrom)))
+	    (s, buf, len, flags, NULL, NULL));
 }
diff --git a/lib/libsys/recvfrom.c b/lib/libsys/recvfrom.c
--- a/lib/libsys/recvfrom.c
+++ b/lib/libsys/recvfrom.c
@@ -43,6 +43,6 @@
 {
 	return (((ssize_t (*)(int, void *, size_t, int,
 	    struct sockaddr *, socklen_t *))
-	    __libsys_interposing[INTERPOS_recvfrom])(s, buf, len, flags,
-	   from, fromlen));
+	    *(__libc_interposing_slot(INTERPOS_recvfrom)))
+	    (s, buf, len, flags, from, fromlen));
 }
diff --git a/lib/libsys/recvmsg.c b/lib/libsys/recvmsg.c
--- a/lib/libsys/recvmsg.c
+++ b/lib/libsys/recvmsg.c
@@ -41,5 +41,5 @@
 recvmsg(int s, struct msghdr *msg, int flags)
 {
 	return (((int (*)(int, struct msghdr *, int))
-	    __libsys_interposing[INTERPOS_recvmsg])(s, msg, flags));
+	    *(__libc_interposing_slot(INTERPOS_recvmsg)))(s, msg, flags));
 }
diff --git a/lib/libsys/select.c b/lib/libsys/select.c
--- a/lib/libsys/select.c
+++ b/lib/libsys/select.c
@@ -40,5 +40,5 @@
 select(int n, fd_set *rs, fd_set *ws, fd_set *es, struct timeval *t)
 {
 	return (((int (*)(int, fd_set *, fd_set *, fd_set *, struct timeval *))
-	    __libsys_interposing[INTERPOS_select])(n, rs, ws, es, t));
+	    *(__libc_interposing_slot(INTERPOS_select)))(n, rs, ws, es, t));
 }
diff --git a/lib/libsys/send.c b/lib/libsys/send.c
--- a/lib/libsys/send.c
+++ b/lib/libsys/send.c
@@ -44,6 +44,6 @@
 	 */
 	return (((ssize_t (*)(int, const void *, size_t, int,
 	    const struct sockaddr *, socklen_t))
-	    __libsys_interposing[INTERPOS_sendto])(s, msg, len, flags,
+	    *__libc_interposing_slot(INTERPOS_sendto))(s, msg, len, flags,
 	    NULL, 0));
 }
diff --git a/lib/libsys/sendmsg.c b/lib/libsys/sendmsg.c
--- a/lib/libsys/sendmsg.c
+++ b/lib/libsys/sendmsg.c
@@ -41,5 +41,5 @@
 sendmsg(int s, const struct msghdr *msg, int flags)
 {
 	return (((int (*)(int, const struct msghdr *, int))
-	    __libsys_interposing[INTERPOS_sendmsg])(s, msg, flags));
+	    *(__libc_interposing_slot(INTERPOS_sendmsg)))(s, msg, flags));
 }
diff --git a/lib/libsys/sendto.c b/lib/libsys/sendto.c
--- a/lib/libsys/sendto.c
+++ b/lib/libsys/sendto.c
@@ -43,6 +43,6 @@
 {
 	return (((ssize_t (*)(int, const void *, size_t, int,
 	    const struct sockaddr *, socklen_t))
-	    __libsys_interposing[INTERPOS_sendto])(s, msg, len, flags,
-	    to, tolen));
+	    *(__libc_interposing_slot(INTERPOS_sendto)))
+	    (s, msg, len, flags, to, tolen));
 }
diff --git a/lib/libsys/setcontext.c b/lib/libsys/setcontext.c
--- a/lib/libsys/setcontext.c
+++ b/lib/libsys/setcontext.c
@@ -43,5 +43,5 @@
 setcontext(const ucontext_t *uc)
 {
 	return (((int (*)(const ucontext_t *))
-	    __libsys_interposing[INTERPOS_setcontext])(uc));
+	    *(__libc_interposing_slot(INTERPOS_setcontext)))(uc));
 }
diff --git a/lib/libsys/sigaction.c b/lib/libsys/sigaction.c
--- a/lib/libsys/sigaction.c
+++ b/lib/libsys/sigaction.c
@@ -41,5 +41,5 @@
 sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
 {
 	return (((int (*)(int, const struct sigaction *, struct sigaction *))
-	    __libsys_interposing[INTERPOS_sigaction])(sig, act, oact));
+	    *(__libc_interposing_slot(INTERPOS_sigaction)))(sig, act, oact));
 }
diff --git a/lib/libsys/sigprocmask.c b/lib/libsys/sigprocmask.c
--- a/lib/libsys/sigprocmask.c
+++ b/lib/libsys/sigprocmask.c
@@ -41,5 +41,5 @@
 sigprocmask(int how, const sigset_t *set, sigset_t *oset)
 {
 	return (((int (*)(int, const sigset_t *, sigset_t *))
-	    __libsys_interposing[INTERPOS_sigprocmask])(how, set, oset));
+	    *(__libc_interposing_slot(INTERPOS_sigprocmask)))(how, set, oset));
 }
diff --git a/lib/libsys/sigsuspend.c b/lib/libsys/sigsuspend.c
--- a/lib/libsys/sigsuspend.c
+++ b/lib/libsys/sigsuspend.c
@@ -41,5 +41,5 @@
 sigsuspend(const sigset_t *set)
 {
 	return (((int (*)(const sigset_t *))
-	    __libsys_interposing[INTERPOS_sigsuspend])(set));
+	    *(__libc_interposing_slot(INTERPOS_sigsuspend)))(set));
 }
diff --git a/lib/libsys/sigtimedwait.c b/lib/libsys/sigtimedwait.c
--- a/lib/libsys/sigtimedwait.c
+++ b/lib/libsys/sigtimedwait.c
@@ -42,5 +42,5 @@
 {
 	return (((int (*)(const sigset_t *, siginfo_t *,
 	    const struct timespec *))
-	    __libsys_interposing[INTERPOS_sigtimedwait])(set, info, t));
+	    *(__libc_interposing_slot(INTERPOS_sigtimedwait)))(set, info, t));
 }
diff --git a/lib/libsys/sigwait.c b/lib/libsys/sigwait.c
--- a/lib/libsys/sigwait.c
+++ b/lib/libsys/sigwait.c
@@ -33,5 +33,5 @@
 sigwait(const sigset_t *set, int *sig)
 {
 	return (((int (*)(const sigset_t *, int *))
-	    __libsys_interposing[INTERPOS_sigwait])(set, sig));
+	    *(__libc_interposing_slot(INTERPOS_sigwait)))(set, sig));
 }
diff --git a/lib/libsys/sigwaitinfo.c b/lib/libsys/sigwaitinfo.c
--- a/lib/libsys/sigwaitinfo.c
+++ b/lib/libsys/sigwaitinfo.c
@@ -40,5 +40,5 @@
 sigwaitinfo(const sigset_t * __restrict set, siginfo_t * __restrict info)
 {
 	return (((int (*)(const sigset_t *, siginfo_t *))
-	    __libsys_interposing[INTERPOS_sigwaitinfo])(set, info));
+	    *(__libc_interposing_slot(INTERPOS_sigwaitinfo)))(set, info));
 }
diff --git a/lib/libsys/swapcontext.c b/lib/libsys/swapcontext.c
--- a/lib/libsys/swapcontext.c
+++ b/lib/libsys/swapcontext.c
@@ -45,5 +45,5 @@
 swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
 {
 	return (((int (*)(ucontext_t *, const ucontext_t *))
-	    __libsys_interposing[INTERPOS_swapcontext])(oucp, ucp));
+	    *(__libc_interposing_slot(INTERPOS_swapcontext)))(oucp, ucp));
 }
diff --git a/lib/libsys/wait.c b/lib/libsys/wait.c
--- a/lib/libsys/wait.c
+++ b/lib/libsys/wait.c
@@ -44,7 +44,8 @@
 __wait(int *istat)
 {
 	return (((pid_t (*)(pid_t, int *, int, struct rusage *))
-	    __libsys_interposing[INTERPOS_wait4])(WAIT_ANY, istat, 0, NULL));
+	    *(__libc_interposing_slot(INTERPOS_wait4)))
+	    (WAIT_ANY, istat, 0, NULL));
 }
 
 __weak_reference(__wait, wait);
diff --git a/lib/libsys/wait3.c b/lib/libsys/wait3.c
--- a/lib/libsys/wait3.c
+++ b/lib/libsys/wait3.c
@@ -44,8 +44,8 @@
 __wait3(int *istat, int options, struct rusage *rup)
 {
 	return (((pid_t (*)(pid_t, int *, int, struct rusage *))
-	    __libsys_interposing[INTERPOS_wait4])(WAIT_ANY, istat, options,
-	    rup));
+	    *(__libc_interposing_slot(INTERPOS_wait4)))
+	    (WAIT_ANY, istat, options, rup));
 }
 
 __weak_reference(__wait3, wait3);
diff --git a/lib/libsys/wait4.c b/lib/libsys/wait4.c
--- a/lib/libsys/wait4.c
+++ b/lib/libsys/wait4.c
@@ -40,5 +40,6 @@
 wait4(pid_t pid, int *status, int options, struct rusage *ru)
 {
 	return (((pid_t (*)(pid_t, int *, int, struct rusage *))
-	    __libsys_interposing[INTERPOS_wait4])(pid, status, options, ru));
+	    *(__libc_interposing_slot(INTERPOS_wait4)))
+	    (pid, status, options, ru));
 }
diff --git a/lib/libsys/wait6.c b/lib/libsys/wait6.c
--- a/lib/libsys/wait6.c
+++ b/lib/libsys/wait6.c
@@ -42,6 +42,6 @@
     siginfo_t *infop)
 {
 	return (((pid_t (*)(idtype_t, id_t, int *, int, struct __wrusage *,
-	    siginfo_t *))__libsys_interposing[INTERPOS_wait6])(idtype, id,
-	    status, options, ru, infop));
+	    siginfo_t *))*(__libc_interposing_slot(INTERPOS_wait6)))
+	    (idtype, id, status, options, ru, infop));
 }
diff --git a/lib/libsys/waitid.c b/lib/libsys/waitid.c
--- a/lib/libsys/waitid.c
+++ b/lib/libsys/waitid.c
@@ -47,8 +47,8 @@
 	pid_t ret;
 
 	ret = ((pid_t (*)(idtype_t, id_t, int *, int, struct __wrusage *,
-	    siginfo_t *))__libsys_interposing[INTERPOS_wait6])(idtype, id,
-	    &status, flags, NULL, info);
+	    siginfo_t *))*(__libc_interposing_slot(INTERPOS_wait6)))
+	    (idtype, id, &status, flags, NULL, info);
 
 	/*
 	 * According to SUSv4, waitid() shall not return a PID when a
diff --git a/lib/libsys/waitpid.c b/lib/libsys/waitpid.c
--- a/lib/libsys/waitpid.c
+++ b/lib/libsys/waitpid.c
@@ -44,7 +44,8 @@
 __waitpid(pid_t pid, int *istat, int options)
 {
 	return (((pid_t (*)(pid_t, int *, int, struct rusage *))
-	    __libsys_interposing[INTERPOS_wait4])(pid, istat, options, NULL));
+	    *(__libc_interposing_slot(INTERPOS_wait4)))
+	    (pid, istat, options, NULL));
 }
 
 __weak_reference(__waitpid, waitpid);
diff --git a/lib/libsys/write.c b/lib/libsys/write.c
--- a/lib/libsys/write.c
+++ b/lib/libsys/write.c
@@ -41,5 +41,5 @@
 write(int fd, const void *buf, size_t nbytes)
 {
 	return (((ssize_t (*)(int, const void *, size_t))
-	    __libsys_interposing[INTERPOS_write])(fd, buf, nbytes));
+	    *(__libc_interposing_slot(INTERPOS_write)))(fd, buf, nbytes));
 }
diff --git a/lib/libsys/writev.c b/lib/libsys/writev.c
--- a/lib/libsys/writev.c
+++ b/lib/libsys/writev.c
@@ -42,5 +42,5 @@
 writev(int fd, const struct iovec *iov, int iovcnt)
 {
 	return (((ssize_t (*)(int, const struct iovec *, int))
-	    __libsys_interposing[INTERPOS_writev])(fd, iov, iovcnt));
+	    *(__libc_interposing_slot(INTERPOS_writev)))(fd, iov, iovcnt));
 }