diff --git a/callback_table.c b/callback_table.c
index 25b9e713cc..2c9ff3d841 100644
--- a/callback_table.c
+++ b/callback_table.c
@@ -2,6 +2,7 @@
 
 #include "stdafx.h"
 #include "openttd.h"
+#include "callback_table.h"
 #include "functions.h"
 
 // If you add a callback for DoCommandP, also add the callback in here