diff --git a/nx/include/switch/arm/atomics.h b/nx/include/switch/arm/atomics.h
index c6714234..e902789d 100644
--- a/nx/include/switch/arm/atomics.h
+++ b/nx/include/switch/arm/atomics.h
@@ -1,3 +1,4 @@
+#pragma once
 #include "../types.h"
 
 static inline u32 atomicIncrement32(u32* p) {