diff --git a/src/game/hardcoded.h b/src/game/hardcoded.h
index 20f6fa73..1fc5e4ec 100644
--- a/src/game/hardcoded.h
+++ b/src/game/hardcoded.h
@@ -1,4 +1,5 @@
 #ifndef HARDCODED_H
+#define HARDCODED_H
 #include "types.h"
 #include "level_table.h"
 #include "dialog_ids.h"