diff --git a/include/createEnemy.h b/include/createEnemy.h
index 2763da03..584632ca 100644
--- a/include/createEnemy.h
+++ b/include/createEnemy.h
@@ -1,3 +1,8 @@
+#ifndef GUARD_CREATEENEMY_H
+#define GUARD_CREATEENEMY_H
+
 #include "entity.h"
 
 Entity* CreateEnemy(u8, u8);
+
+#endif // GUARD_CREATEENEMY_H