diff --git a/conf/homeserver.yaml b/conf/homeserver.yaml
index 368a9df..a61ad43 100644
--- a/conf/homeserver.yaml
+++ b/conf/homeserver.yaml
@@ -1419,7 +1419,7 @@ account_threepid_delegates:
 {%- if auto_join_rooms %}
 auto_join_rooms:
     {%- for room in auto_join_rooms.split(',') %}
-  - {{ room }}
+  - '{{ room }}'
     {%- endfor %}
 {%- endif %}