diff --git a/imp/lib/Ajax/Imple/ItipRequest.php b/imp/lib/Ajax/Imple/ItipRequest.php
index 1f10b98fb82..6ce0bbc4c3a 100644
--- a/imp/lib/Ajax/Imple/ItipRequest.php
+++ b/imp/lib/Ajax/Imple/ItipRequest.php
@@ -89,14 +89,20 @@ protected function _handle(Horde_Variables $vars)
                 if ($registry->hasMethod('calendar/delete')) {
                     $guid = $components[$key]->getAttribute('UID');
                     $recurrenceId = null;
-
                     try {
                         // This is a cancellation of a recurring event instance.
                         $recurrenceId = $components[$key]->getAttribute('RECURRENCE-ID');
+                        $atts = $components[$key]->getAttribute('RECURRENCE-ID', true);
+                        $range = null;
+                        foreach ($atts as $att) {
+                            if (array_key_exists('RANGE', $att)) {
+                                $range = $att['RANGE'];
+                            }
+                        }
                     } catch (Horde_Icalendar_Exception $e) {}
 
                     try {
-                        $registry->call('calendar/delete', array($guid, $recurrenceId));
+                        $registry->call('calendar/delete', array($guid, $recurrenceId, $range));
                         $notification->push(_("Event successfully deleted."), 'horde.success');
                         $result = true;
                     } catch (Horde_Exception $e) {