diff --git a/src/gui/editors/PianoRoll.cpp b/src/gui/editors/PianoRoll.cpp
index 003082594..905ba9bda 100644
--- a/src/gui/editors/PianoRoll.cpp
+++ b/src/gui/editors/PianoRoll.cpp
@@ -997,6 +997,7 @@ void PianoRoll::shiftPos( int amount ) //shift notes pos by amount
 	}
 
 	m_pattern->rearrangeAllNotes();
+	m_pattern->updateLength();
 	m_pattern->dataChanged();
 
 	// we modified the song