diff --git a/include/PianoRoll.h b/include/PianoRoll.h
index 8437c9ad9..639a042a7 100644
--- a/include/PianoRoll.h
+++ b/include/PianoRoll.h
@@ -120,6 +120,7 @@ protected:
 	virtual void paintEvent( QPaintEvent * _pe );
 	virtual void resizeEvent( QResizeEvent * _re );
 	virtual void wheelEvent( QWheelEvent * _we );
+	virtual void focusOutEvent( QFocusEvent * );
 
 	int getKey( int _y ) const;
 	static inline void drawNoteRect( QPainter & _p, int _x, int _y,
diff --git a/src/gui/PianoRoll.cpp b/src/gui/PianoRoll.cpp
index 266a1415a..01a5de07d 100644
--- a/src/gui/PianoRoll.cpp
+++ b/src/gui/PianoRoll.cpp
@@ -3630,6 +3630,19 @@ void PianoRoll::wheelEvent( QWheelEvent * _we )
 
 
 
+void PianoRoll::focusOutEvent( QFocusEvent * )
+{
+	for( int i = 0; i < NumKeys; ++i )
+	{
+		m_pattern->instrumentTrack()->pianoModel()->midiEventProcessor()->processInEvent( MidiEvent( MidiNoteOff, -1, i, 0 ) );
+		m_pattern->instrumentTrack()->pianoModel()->setKeyState( i, false );
+	}
+	update();
+}
+
+
+
+
 int PianoRoll::getKey( int _y ) const
 {
 	int key_line_y = keyAreaBottom() - 1;