diff --git a/modules/gui/qt4/util/input_slider.cpp b/modules/gui/qt4/util/input_slider.cpp
index ccf84bbab2..f4bfb0102c 100644
--- a/modules/gui/qt4/util/input_slider.cpp
+++ b/modules/gui/qt4/util/input_slider.cpp
@@ -146,6 +146,7 @@ void SeekSlider::mouseMoveEvent(QMouseEvent *event)
     if( b_isSliding )
     {
         setValue( QStyle::sliderValueFromPosition( MINIMUM, MAXIMUM, event->x(), width(), false) );
+        emit sliderMoved( value() );
     }
 
     /* Tooltip */