diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index cfccce7c41..1c4ae9c8a2 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -104,6 +104,8 @@
 #include "qtabwidget.h" // Needed in inTabWidget()
 #endif // QT_KEYPAD_NAVIGATION
 
+#include "qwindowcontainer_p.h"
+
 
 // widget/widget data creation count
 //#define QWIDGET_EXTRA_DEBUG
@@ -6249,6 +6251,17 @@ bool QWidget::isActiveWindow() const
         }
     }
 
+    // Check for an active window container
+    if (QWindow *ww = QGuiApplication::focusWindow()) {
+        while (ww) {
+            QWidgetWindow *qww = qobject_cast<QWidgetWindow *>(ww);
+            QWindowContainer *qwc = qww ? qobject_cast<QWindowContainer *>(qww->widget()) : 0;
+            if (qwc && qwc->topLevelWidget() == tlw)
+                return true;
+            ww = ww->parent();
+        }
+    }
+
     // Check if platform adaptation thinks the window is active. This is necessary for
     // example in case of ActiveQt servers that are embedded into another application.
     // Those are separate processes that are not part of the parent application Qt window/widget