diff --git a/libs/libc/pthread/pthread_rwlock.c b/libs/libc/pthread/pthread_rwlock.c
index d9e915bc596..69b474ac3c6 100644
--- a/libs/libc/pthread/pthread_rwlock.c
+++ b/libs/libc/pthread/pthread_rwlock.c
@@ -55,7 +55,7 @@ int pthread_rwlock_init(FAR pthread_rwlock_t *lock,
 
   if (attr != NULL)
     {
-      return -ENOSYS;
+      return ENOSYS;
     }
 
   lock->num_readers       = 0;