diff --git a/actions/newnotice.php b/actions/newnotice.php
index 8f1fb1c40f..61b38786bd 100644
--- a/actions/newnotice.php
+++ b/actions/newnotice.php
@@ -161,7 +161,7 @@ class NewnoticeAction extends Action
 
         $replyto = intval($this->trimmed('inreplyto'));
         if ($replyto) {
-            $options['replyto'] = $replyto;
+            $options['reply_to'] = $replyto;
         }
 
         $upload = null;