diff --git a/src/widgets/widgets/qmdiarea.cpp b/src/widgets/widgets/qmdiarea.cpp
index 600d9b536f..17f73b2809 100644
--- a/src/widgets/widgets/qmdiarea.cpp
+++ b/src/widgets/widgets/qmdiarea.cpp
@@ -2591,6 +2591,9 @@ bool QMdiArea::eventFilter(QObject *object, QEvent *event)
         return QAbstractScrollArea::eventFilter(object, event);
     }
 
+    if (subWindow->mdiArea() != this)
+        return QAbstractScrollArea::eventFilter(object, event);
+
     // QMdiSubWindow events:
     switch (event->type()) {
     case QEvent::Move: