diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -1268,6 +1268,7 @@ static SettingEntry _settings_constructi
 	SettingEntry("construction.longbridges"),
 	SettingEntry("station.never_expire_airports"),
 	SettingEntry("construction.freeform_edges"),
+	SettingEntry("construction.extra_tree_placement"),
 };
 /** Construction sub-page */
 static SettingsPage _settings_construction_page = {_settings_construction, lengthof(_settings_construction)};