diff --git a/src/gui.h b/src/gui.h
--- a/src/gui.h
+++ b/src/gui.h
@@ -48,35 +48,6 @@ void ShowBuildAirToolbar();
 void ShowGenerateLandscape();
 void ShowHeightmapLoad();
 
-/** Drag and drop selection process, or, what to do with an area of land when
- * you've selected it. */
-enum {
-	DDSP_DEMOLISH_AREA,
-	DDSP_RAISE_AND_LEVEL_AREA,
-	DDSP_LOWER_AND_LEVEL_AREA,
-	DDSP_LEVEL_AREA,
-	DDSP_CREATE_DESERT,
-	DDSP_CREATE_ROCKS,
-	DDSP_CREATE_WATER,
-	DDSP_CREATE_RIVER,
-	DDSP_PLANT_TREES,
-	DDSP_BUILD_BRIDGE,
-
-	/* Rail specific actions */
-	DDSP_PLACE_RAIL_NE,
-	DDSP_PLACE_RAIL_NW,
-	DDSP_PLACE_AUTORAIL,
-	DDSP_BUILD_SIGNALS,
-	DDSP_BUILD_STATION,
-	DDSP_REMOVE_STATION,
-	DDSP_CONVERT_RAIL,
-
-	/* Road specific actions */
-	DDSP_PLACE_ROAD_X_DIR,
-	DDSP_PLACE_ROAD_Y_DIR,
-	DDSP_PLACE_AUTOROAD,
-};
-
 /* misc_gui.cpp */
 void PlaceLandBlockInfo();
 void ShowAboutWindow();