Index: sys/kern/kern_syscalls.c
===================================================================
--- sys/kern/kern_syscalls.c
+++ sys/kern/kern_syscalls.c
@@ -108,7 +108,7 @@
 	} while (atomic_cmpset_rel_32(&se->sy_thrcnt, oldcnt, cnt) == 0);
 }
 
-int
+static int
 syscall_register(int *offset, struct sysent *new_sysent,
     struct sysent *old_sysent, int flags)
 {
@@ -139,7 +139,7 @@
 	return (0);
 }
 
-int
+static int
 syscall_deregister(int *offset, struct sysent *old_sysent)
 {
 	struct sysent *se;
Index: sys/sys/sysent.h
===================================================================
--- sys/sys/sysent.h
+++ sys/sys/sysent.h
@@ -262,9 +262,6 @@
     .syscall_no = NO_SYSCALL					\
 }
 
-int	syscall_register(int *offset, struct sysent *new_sysent,
-	    struct sysent *old_sysent, int flags);
-int	syscall_deregister(int *offset, struct sysent *old_sysent);
 int	syscall_module_handler(struct module *mod, int what, void *arg);
 int	syscall_helper_register(struct syscall_helper_data *sd, int flags);
 int	syscall_helper_unregister(struct syscall_helper_data *sd);