diff -r 185d9fe96c6b -r b147745ba6be ui/qt/window.cpp
--- a/ui/qt/window.cpp	Wed Jul 22 21:21:24 2026 +0200
+++ b/ui/qt/window.cpp	Thu Jul 23 21:46:06 2026 +0200
@@ -113,7 +113,7 @@
         evt.document = evt.obj->ctx->document;
         evt.window = evt.obj->window;
         evt.eventdata = NULL;
-        evt.eventdatatype = 0;
+        evt.eventdatatype = UI_EVENT_DATA_NULL;
         evt.intval = 0;
         if(msgBox.clickedButton() == btn1) {
             evt.intval = 1;