diff --git a/includes/std/mem.pat b/includes/std/mem.pat
index aa45a5f..d239cc4 100644
--- a/includes/std/mem.pat
+++ b/includes/std/mem.pat
@@ -1,3 +1,5 @@
+#pragma once
+
 /*!
     Library for doing raw memory accesses and other low-level operations.
 */