diff --git a/modules/gui/qt4/dialogs/toolbar.cpp b/modules/gui/qt4/dialogs/toolbar.cpp
index d8554c48bbb9c563f3edb180c0c70281f44d2966..2a582f3f954a68595aaa9843dc4b8281c313887d 100644
--- a/modules/gui/qt4/dialogs/toolbar.cpp
+++ b/modules/gui/qt4/dialogs/toolbar.cpp
@@ -630,6 +630,7 @@ bool DroppingController::eventFilter( QObject *obj, QEvent *event )
             }
             return true;
 
+        case QEvent::MouseButtonDblClick:
         case QEvent::EnabledChange:
         case QEvent::Hide:
         case QEvent::HideToParent: