diff --git a/docs/content/guide/interpolation.ngdoc b/docs/content/guide/interpolation.ngdoc
index f991cfa74fba..6fb3f0e860a2 100644
--- a/docs/content/guide/interpolation.ngdoc
+++ b/docs/content/guide/interpolation.ngdoc
@@ -120,8 +120,8 @@ You should instead delegate the computation of complex expressions to the scope,
 ```
 
 ```js
-  function getForm() {
-    return $scope['form' + $index];
+  function getForm(index) {
+    return $scope['form' + index];
   }
 ```