diff --git a/ttd.h b/ttd.h
--- a/ttd.h
+++ b/ttd.h
@@ -419,12 +419,12 @@ enum {
 	WC_ENGINE_PREVIEW = 0x35,
 	WC_MUSIC_WINDOW = 0x36,
 	WC_MUSIC_TRACK_SELECTION = 0x37,
-	WC_SCEN_LAND_GEN = 0x38,
+	WC_SCEN_LAND_GEN = 0x38, // also used for landscaping toolbar
 	WC_ASK_RESET_LANDSCAPE = 0x39,
 	WC_SCEN_TOWN_GEN = 0x3A,
 	WC_SCEN_INDUSTRY = 0x3B,
 	WC_SCEN_BUILD_ROAD = 0x3C,
-	WC_SCEN_BUILD_TREES = 0x3D,
+	WC_BUILD_TREES = 0x3D,
 	WC_SEND_NETWORK_MSG = 0x3E,
 	WC_DROPDOWN_MENU = 0x3F,
 	WC_BUILD_INDUSTRY = 0x40,