diff --git a/ReplyTo/class.replyto.plugin.php b/ReplyTo/class.replyto.plugin.php
index 3e13633..fd402a3 100644
--- a/ReplyTo/class.replyto.plugin.php
+++ b/ReplyTo/class.replyto.plugin.php
@@ -203,7 +203,7 @@ public function base_commentOptions_handler($sender, $args) {
 
         //Check permission
         if (isset($discussion->PermissionCategoryID)) {
-            $CategoryID = val('CategoryPermissionID', $discussion);
+            $CategoryID = val('PermissionCategoryID', $discussion);
         } else {
             $CategoryID = $discussion->CategoryID;
         }