diff --git a/docs/ref/templates/builtins.txt b/docs/ref/templates/builtins.txt
index 2b93bcd642..011359aae8 100644
--- a/docs/ref/templates/builtins.txt
+++ b/docs/ref/templates/builtins.txt
@@ -336,7 +336,7 @@ will be displayed if the value has not changed::
         {% for match in matches %}
             <div style="background-color:
                 {% ifchanged match.ballot_id %}
-                    {% cycle red,blue %}
+                    {% cycle "red" "blue" %}
                 {% else %}
                     grey
                 {% endifchanged %}