diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index 5e6353d421..873a110ca8 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -266,7 +266,7 @@ listeners:
 #
 # 'limit_usage_by_mau' disables/enables monthly active user blocking. When
 # anabled and a limit is reached the server returns a 'ResourceLimitError'
-# with error type Codes.RESOURCE_LIMIT_EXCEEDED
+# with error type Codes.RESOURCE_LIMIT_EXCEEDED.
 #
 # 'max_mau_value' is the hard limit of monthly active users above which
 # the server will start blocking user actions.