diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
index 3e04e0b1d6..2263721c5a 100644
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -570,8 +570,15 @@ struct GameOptionsWindow : Window {
 			case WID_GO_GUI_ZOOM_DROPDOWN:
 				GfxClearSpriteCache();
 				_gui_zoom = (ZoomLevel)(ZOOM_LVL_OUT_4X - index);
+				switch (_gui_zoom) {
+					case ZOOM_LVL_NORMAL: ChangeResInGame(854, 480); break;
+					case ZOOM_LVL_OUT_2X: ChangeResInGame(1280, 720); break;
+					case ZOOM_LVL_OUT_4X: ChangeResInGame(1920, 1080); break;
+					default: break;
+				}
 				UpdateCursorSize();
 				LoadStringWidthTable();
+				ReconstructUserInterface();
 				break;
 
 			case WID_GO_BASE_GRF_DROPDOWN: