diff --git a/index.mdwn b/index.mdwn
index e3620d1..0ab96c9 100644
--- a/index.mdwn
+++ b/index.mdwn
@@ -30,7 +30,7 @@ formatting-related.
 
 #### Joining Mailing Lists
 
-   * Subscribe to our low-traffic [announcements-only mailing list](https://lists.copyleft.org/cgi-bin/mailman/listinfo/announce)
+   * Subscribe to our low-traffic [announcements-only mailing list](https://lists.copyleft.org/cgi-bin/mailman/listinfo/announce).
    * Join discussion on our [primary mailing list, called "discuss"](https://lists.copyleft.org/cgi-bin/mailman/listinfo/discuss).
 
 #### IRC Discussion