diff --git a/src/misc/dbg_helpers.cpp b/src/misc/dbg_helpers.cpp
--- a/src/misc/dbg_helpers.cpp
+++ b/src/misc/dbg_helpers.cpp
@@ -5,6 +5,7 @@
 #include "../stdafx.h"
 #include "../openttd.h"
 #include "../direction_type.h"
+#include "../strings_type.h"
 #include "../rail.h"
 #include "../rail_map.h"
 #include "dbg_helpers.h"