diff --git a/libs/ardour/playlist.cc b/libs/ardour/playlist.cc
index 47462a3575..d939ba61b0 100644
--- a/libs/ardour/playlist.cc
+++ b/libs/ardour/playlist.cc
@@ -706,7 +706,7 @@ Playlist::flush_notifications (bool from_undo)
 		 }
 	 }
 
-	 possibly_splice_unlocked (position, (pos + length) - position, boost::shared_ptr<Region>());
+	 possibly_splice_unlocked (position, (pos + length) - position, region);
  }
 
  void