diff --git a/src/group_gui.cpp b/src/group_gui.cpp
--- a/src/group_gui.cpp
+++ b/src/group_gui.cpp
@@ -21,7 +21,6 @@
 #include "vehicle_func.h"
 #include "autoreplace_gui.h"
 #include "company_func.h"
-#include "widgets/dropdown_type.h"
 #include "widgets/dropdown_func.h"
 #include "tilehighlight_func.h"
 #include "vehicle_gui_base.h"