diff --git a/conf/example.conf b/conf/example.conf
index b5ead17..3768667 100644
--- a/conf/example.conf
+++ b/conf/example.conf
@@ -82,7 +82,8 @@
 repo    gitolite-admin
         RW+                             =   @admins
 
-                # "@all" is a special, predefined, group name
+                # "@all" is a special, predefined, group name of all users
+                # (everyone who has a pubkey in keydir)
 repo    testing
         RW+                             =   @all