diff --git a/ui/qt/widgets/drag_drop_toolbar.cpp b/ui/qt/widgets/drag_drop_toolbar.cpp
index 2699d09759..a6458d8a1f 100644
--- a/ui/qt/widgets/drag_drop_toolbar.cpp
+++ b/ui/qt/widgets/drag_drop_toolbar.cpp
@@ -115,6 +115,9 @@ bool DragDropToolBar::eventFilter(QObject * obj, QEvent * event)
         if ( ( ev->buttons() & Qt::LeftButton ) && (ev->pos() - dragStartPosition).manhattanLength()
                  > QApplication::startDragDistance())
         {
+            if ( ! qobject_cast<QToolButton *>(elem) || ! elem->property(drag_drop_toolbar_action_).isValid() )
+                return QToolBar::eventFilter(obj, event);
+
             ToolbarEntryMimeData * temd =
                     new ToolbarEntryMimeData(((QToolButton *)elem)->text(), elem->property(drag_drop_toolbar_action_).toInt());
             DragLabel * lbl = new DragLabel(temd->labelText(), this);