diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index 427fb55ecd8..2f9b8391e15 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -2299,6 +2299,10 @@ void QObject::removeEventFilter(QObject *obj)
 */
 void QObject::deleteLater()
 {
+#ifdef QT_DEBUG
+    if (qApp == this)
+        qWarning("You are deferring the delete of QCoreApplication, this may not work as expected.");
+#endif
     QCoreApplication::postEvent(this, new QDeferredDeleteEvent());
 }