diff --git a/src/plugins/coreplugin/manhattanstyle.cpp b/src/plugins/coreplugin/manhattanstyle.cpp
index 115e3fd35ed..b8ce1a9902b 100644
--- a/src/plugins/coreplugin/manhattanstyle.cpp
+++ b/src/plugins/coreplugin/manhattanstyle.cpp
@@ -592,6 +592,10 @@ int ManhattanStyle::pixelMetric(PixelMetric metric, const QStyleOption *option,
         if (qobject_cast<const QLineEdit*>(widget) && panelWidget(widget))
             return 1;
         break;
+    case PM_ToolBarExtensionExtent:
+        if (StyleHelper::isQDSTheme())
+            retval = 29;
+        break;
     default:
         break;
     }