diff --git a/docs/upgrading/upgrading-your-package.md b/docs/upgrading/upgrading-your-package.md
index 35101f8b9..52016d0cd 100644
--- a/docs/upgrading/upgrading-your-package.md
+++ b/docs/upgrading/upgrading-your-package.md
@@ -413,6 +413,7 @@ You can group multiple disposables into a single disposable with a `CompositeDis
 
 class Something
   constructor: ->
+    editor = atom.workspace.getActiveTextEditor()
     @disposables.add editor.onDidChange ->
     @disposables.add editor.onDidChangePath ->