diff --git a/sys/sys/aio.h b/sys/sys/aio.h
index d6ef6aaf701b..35e9b15742a0 100644
--- a/sys/sys/aio.h
+++ b/sys/sys/aio.h
@@ -130,7 +130,7 @@ int	aio_suspend(const struct aiocb * const[], int, const struct timespec *);
  */
 int	aio_mlock(struct aiocb *);
 
-#ifdef __BSD_VISIBLE
+#if __BSD_VISIBLE
 int	aio_waitcomplete(struct aiocb **, struct timespec *);
 #endif
 
diff --git a/sys/sys/shm.h b/sys/sys/shm.h
index ed068e7e3f73..7463a6ace33d 100644
--- a/sys/sys/shm.h
+++ b/sys/sys/shm.h
@@ -154,7 +154,7 @@ typedef __size_t        size_t;
 #endif
 
 __BEGIN_DECLS
-#ifdef __BSD_VISIBLE
+#if __BSD_VISIBLE
 int shmsys(int, ...);
 #endif
 void *shmat(int, const void *, int);