diff --git a/templates/opt/matrix/config/homeserver.yml.j2 b/templates/opt/matrix/config/homeserver.yml.j2
index 63e4d86..eb162b0 100644
--- a/templates/opt/matrix/config/homeserver.yml.j2
+++ b/templates/opt/matrix/config/homeserver.yml.j2
@@ -335,7 +335,8 @@ thumbnail_sizes:
 url_preview_enabled: {{ 'true' if matrix_url_preview_enabled else 'false' }}
 
 # List of IP address CIDR ranges that the URL preview spider is denied
-# from accessing.{% if matrix_url_preview_ip_blacklist is defined %}
+# from accessing.
+{% if matrix_url_preview_ip_blacklist is defined %}
 url_preview_ip_range_blacklist:
 {{ matrix_url_preview_ip_blacklist | to_nice_yaml(indent=2) }}
 {% endif %}