diff --git a/libluna/include/luna/Types.h b/libluna/include/luna/Types.h
index e1924440..b9c940d1 100644
--- a/libluna/include/luna/Types.h
+++ b/libluna/include/luna/Types.h
@@ -1,3 +1,4 @@
+#pragma once
 #include <stddef.h>
 #include <stdint.h>