diff --git a/lib/joinform.php b/lib/joinform.php
index 9a14b09401..1edb2f72dc 100644
--- a/lib/joinform.php
+++ b/lib/joinform.php
@@ -77,7 +77,7 @@ class JoinForm extends Form
 
     function id()
     {
-        return 'subscribe-' . $this->group->id;
+        return 'group-join-' . $this->group->id;
     }
 
     /**