diff --git a/source/frontend/widgets/pianoroll.py b/source/frontend/widgets/pianoroll.py
index 735a02089..f1dabf64b 100755
--- a/source/frontend/widgets/pianoroll.py
+++ b/source/frontend/widgets/pianoroll.py
@@ -560,7 +560,7 @@ class PianoRoll(QGraphicsScene):
                             note.moveEvent(event)
 
     def mouseReleaseEvent(self, event):
-        QGraphicsScene.mouseReleaseEvent
+        QGraphicsScene.mouseReleaseEvent(self, event)
 
         if self.last_piano_note is not None:
             self.noteclicked.emit(self.last_piano_note, False)