diff --git a/nx/include/switch/kernel/condvar.h b/nx/include/switch/kernel/condvar.h
index cd428b72..5d05c1f3 100644
--- a/nx/include/switch/kernel/condvar.h
+++ b/nx/include/switch/kernel/condvar.h
@@ -4,6 +4,7 @@
  * @author plutoo
  * @copyright libnx Authors
  */
+#pragma once
 #include "../types.h"
 #include "../kernel/mutex.h"