diff --git a/usr.sbin/rpc.lockd/lockd_lock.c b/usr.sbin/rpc.lockd/lockd_lock.c
index 25e74ed6a7de..1fc4ce23597a 100644
--- a/usr.sbin/rpc.lockd/lockd_lock.c
+++ b/usr.sbin/rpc.lockd/lockd_lock.c
@@ -217,7 +217,6 @@ enum nlm_stats	do_test(struct file_lock *fl,
 enum nlm_stats	do_unlock(struct file_lock *fl);
 enum nlm_stats	do_lock(struct file_lock *fl);
 void	do_clear(const char *hostname);
-size_t	strnlen(const char *, size_t);
 
 void
 debuglog(char const *fmt, ...)
@@ -373,17 +372,6 @@ copy_nlm4_lock_to_nlm4_holder(src, exclusive, dest)
 	dest->l_len = src->l_len;
 }
 
-
-size_t
-strnlen(const char *s, size_t len)
-{
-    size_t n;
-
-    for (n = 0;  s[n] != 0 && n < len; n++)
-        ;
-    return n;
-}
-
 /*
  * allocate_file_lock: Create a lock with the given parameters
  */