diff --git a/lib/libc/include/compat.h b/lib/libc/include/compat.h
--- a/lib/libc/include/compat.h
+++ b/lib/libc/include/compat.h
@@ -74,8 +74,6 @@
 #define	__weak_reference(sym,alias)	\
 	.weak	alias;.equ	alias,sym
 
-__weak_reference(__sys_fcntl, __fcntl_compat)
-
 #undef __weak_reference
 
 #endif	/* __LIBC_COMPAT_H__ */
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
@@ -418,7 +418,6 @@
 		    int * restrict sig);
 int		__libc_system(const char *);
 int		__libc_tcdrain(int);
-int		__fcntl_compat(int fd, int cmd, ...);
 
 int		__sys_futimens(int fd, const struct timespec *times) __hidden;
 int		__sys_utimensat(int fd, const char *path,