diff --git a/src/editor-scroll-view-component.coffee b/src/editor-scroll-view-component.coffee
index e89ffec12..ba2a50755 100644
--- a/src/editor-scroll-view-component.coffee
+++ b/src/editor-scroll-view-component.coffee
@@ -180,6 +180,8 @@ EditorScrollViewComponent = React.createClass
   # and use the scrollHeight / scrollWidth as its height and width in
   # calculations.
   measureHeightAndWidth: ->
+    return unless @isMounted()
+
     {editor} = @props
     node = @getDOMNode()
     computedStyle = getComputedStyle(node)