diff --git a/src/autoreplace_gui.h b/src/autoreplace_gui.h
new file mode 100644
--- /dev/null
+++ b/src/autoreplace_gui.h
@@ -0,0 +1,19 @@
+/* $Id$ */
+
+/** @file autoreplace_gui.h Functions related to the autoreplace GUIs*/
+
+#ifndef AUTOREPLACE_GUI_H
+#define AUTOREPLACE_GUI_H
+
+#include "vehicle_type.h"
+
+/**
+ * When an engine is made buildable or is removed from being buildable, add/remove it from the build/autoreplace lists
+ * @param type The type of engine
+ */
+void AddRemoveEngineFromAutoreplaceAndBuildWindows(VehicleType type);
+void InvalidateAutoreplaceWindow(EngineID e, GroupID id_g);
+void ShowReplaceVehicleWindow(VehicleType vehicletype);
+void ShowReplaceGroupVehicleWindow(GroupID group, VehicleType veh);
+
+#endif /* AUTOREPLACE_GUI_H */