diff --git a/src/plugins/qmldesigner/styledoutputpaneplaceholder.cpp b/src/plugins/qmldesigner/styledoutputpaneplaceholder.cpp
index f1cf0b8b06a..3163f271a67 100644
--- a/src/plugins/qmldesigner/styledoutputpaneplaceholder.cpp
+++ b/src/plugins/qmldesigner/styledoutputpaneplaceholder.cpp
@@ -46,14 +46,10 @@ void StyledOutputpanePlaceHolder::childEvent(QChildEvent *event)
     Core::OutputPanePlaceHolder::childEvent(event);
 
     if (event->type() == QEvent::ChildAdded) {
-        QWidget *child = qobject_cast<QWidget*>(event->child());
-        if (child) {
+        if (QWidget *child = qobject_cast<QWidget*>(event->child())) {
             QList<QTabWidget*> widgets = child->findChildren<QTabWidget*>();
-            if (!widgets.isEmpty()) {
-                widgets.first()->parentWidget()->ensurePolished();
+            if (!widgets.isEmpty())
                 widgets.first()->parentWidget()->setStyleSheet(m_customStylesheet);
-            }
-
         }
     } else if (event->type() == QEvent::ChildRemoved) {
         QWidget *child = qobject_cast<QWidget*>(event->child());
diff --git a/src/plugins/qmldesigner/styledoutputpaneplaceholder.h b/src/plugins/qmldesigner/styledoutputpaneplaceholder.h
index 9ef51b8fa16..147b7192bea 100644
--- a/src/plugins/qmldesigner/styledoutputpaneplaceholder.h
+++ b/src/plugins/qmldesigner/styledoutputpaneplaceholder.h
@@ -37,7 +37,7 @@ public:
     explicit StyledOutputpanePlaceHolder(Core::IMode *mode, QSplitter *parent = 0);
 
 protected:
-    void childEvent(QChildEvent *event);
+    void childEvent(QChildEvent *event) override;;
 
 private:
     QString m_customStylesheet;