diff --git a/src/gui/widgets/knob.cpp b/src/gui/widgets/knob.cpp
index ee83a31b2..b73de4933 100644
--- a/src/gui/widgets/knob.cpp
+++ b/src/gui/widgets/knob.cpp
@@ -393,7 +393,7 @@ float knob::getValue( const QPoint & _p )
 	{
 		return ( _p.y() * model()->step<float>());
 	}
-	return ( _p.y() * SMOOTH_FACTOR * pageSize() );
+	return ( _p.y() * KNOB_SMOOTH_FACTOR * pageSize() );
 }