diff --git a/src/gui/kernel/qevent.h b/src/gui/kernel/qevent.h
index a24f0c471ce..d257e50b5c5 100644
--- a/src/gui/kernel/qevent.h
+++ b/src/gui/kernel/qevent.h
@@ -910,6 +910,7 @@ private:
 };
 
 #ifndef QT_NO_DEBUG_STREAM
+// ### Qt 7: move this to Qt Core and add a hook to allow GUI events to be printed: QTBUG-127680
 Q_GUI_EXPORT QDebug operator<<(QDebug, const QEvent *);
 #endif