diff --git a/src/newgrf_gui.cpp b/src/newgrf_gui.cpp
index 6d5a78b897..54cbdd536d 100644
--- a/src/newgrf_gui.cpp
+++ b/src/newgrf_gui.cpp
@@ -485,6 +485,9 @@ static void NewGRFWndProc(Window *w, WindowEvent *e)
 			break;
 
 		case WE_DESTROY:
+			if (!WP(w, newgrf_d).execute) {
+				CopyGRFConfigList(WP(w, newgrf_d).orig_list, *WP(w, newgrf_d).list);
+			}
 			/* Remove the temporary copy of grf-list used in window */
 			ClearGRFConfigList(WP(w, newgrf_d).list);
 			break;