diff --git a/dock_gui.c b/dock_gui.c
--- a/dock_gui.c
+++ b/dock_gui.c
@@ -1,6 +1,6 @@
 #include "stdafx.h"
 #include "ttd.h"
-
+#include "table/strings.h"
 #include "window.h"
 #include "gui.h"
 #include "viewport.h"