diff --git a/gui.h b/gui.h
index 7a4d4f4d8b..ce80b21450 100644
--- a/gui.h
+++ b/gui.h
@@ -143,7 +143,6 @@ void ShowQueryString(StringID str, StringID caption, uint maxlen, uint maxwidth,
 void ShowMusicWindow(void);
 
 /* main_gui.c */
-VARDEF byte _construct_mode;
 VARDEF byte _station_show_coverage;
 VARDEF PlaceProc *_place_proc;
 
diff --git a/terraform_gui.c b/terraform_gui.c
index 7113b6dd0e..8b04caf2a6 100644
--- a/terraform_gui.c
+++ b/terraform_gui.c
@@ -10,6 +10,7 @@
 #include "window.h"
 #include "gui.h"
 #include "viewport.h"
+#include "gfx.h"
 #include "sound.h"
 #include "command.h"
 #include "vehicle.h"