diff --git a/roadveh_gui.c b/roadveh_gui.c
--- a/roadveh_gui.c
+++ b/roadveh_gui.c
@@ -368,7 +368,7 @@ static void DrawNewRoadVehWindow(Window 
 	}
 }
 
-static void CcBuildRoadVeh(bool success, uint tile, uint32 p1, uint32 p2)
+void CcBuildRoadVeh(bool success, uint tile, uint32 p1, uint32 p2)
 {
 	Vehicle *v;