diff --git a/src/app/buffer-marker.coffee b/src/app/buffer-marker.coffee
index 245e0142c..c8693372e 100644
--- a/src/app/buffer-marker.coffee
+++ b/src/app/buffer-marker.coffee
@@ -141,7 +141,7 @@ class BufferMarker
     @suppressObserverNotification = false
     @notifyObservers({oldHeadPosition, newHeadPosition, oldTailPosition, newTailPosition, bufferChanged})
 
-  invalidate: (preserve) ->
+  invalidate: ->
     delete @buffer.validMarkers[@id]
     @buffer.invalidMarkers[@id] = this