diff --git a/content/collections/modifiers/group_by.md b/content/collections/modifiers/group_by.md
index 5af04b63..ec198919 100644
--- a/content/collections/modifiers/group_by.md
+++ b/content/collections/modifiers/group_by.md
@@ -22,7 +22,7 @@ sponsors:
 {{ sponsors group_by="sport" }}
   {{ basketball }}
     <h2>{{ team }}</h2>
-  {{ /basketball
+  {{ /basketball }}
 {{ /sponsors }}
 ```