diff --git a/include/Knob.h b/include/Knob.h
index 319b38184..245963ce2 100644
--- a/include/Knob.h
+++ b/include/Knob.h
@@ -74,6 +74,7 @@ class LMMS_EXPORT Knob : public QWidget, public FloatModelView
 public:
 	Knob( knobTypes _knob_num, QWidget * _parent = NULL, const QString & _name = QString() );
 	Knob( QWidget * _parent = NULL, const QString & _name = QString() ); //!< default ctor
+	Knob( const Knob& other ) = delete;
 	virtual ~Knob();
 
 	// TODO: remove