diff --git a/lib/Horde/ActiveSync/Imap/Adapter.php b/lib/Horde/ActiveSync/Imap/Adapter.php
index 29848975c..c7ff815e7 100644
--- a/lib/Horde/ActiveSync/Imap/Adapter.php
+++ b/lib/Horde/ActiveSync/Imap/Adapter.php
@@ -107,7 +107,7 @@ public function appendMessage($folderid, $msg, array $flags = array())
             return false;
         }
 
-        return array_pop($ids->ids);
+        return array_slice($ids->ids, -1)[0];
     }
 
     /**