diff --git a/src/widgets/dialogs/qmessagebox.cpp b/src/widgets/dialogs/qmessagebox.cpp
index 2bc7acc23d..1ff677847a 100644
--- a/src/widgets/dialogs/qmessagebox.cpp
+++ b/src/widgets/dialogs/qmessagebox.cpp
@@ -100,8 +100,11 @@ public:
         void contextMenuEvent(QContextMenuEvent * e) override
         {
             QMenu *menu = createStandardContextMenu();
-            menu->setAttribute(Qt::WA_DeleteOnClose);
-            menu->popup(e->globalPos());
+            if (menu)
+            {
+                menu->setAttribute(Qt::WA_DeleteOnClose);
+                menu->popup(e->globalPos());
+            }
         }
 #endif // QT_NO_CONTEXTMENU
     };