diff --git a/inc/schedule-functions.php b/inc/schedule-functions.php
index c3ce82e7..f2eccd5f 100644
--- a/inc/schedule-functions.php
+++ b/inc/schedule-functions.php
@@ -312,7 +312,7 @@ function processItipCancel( vCalendar $vcal, vProperty $attendee, WritableCollec
 
   if ( $attendee_calendar->actualDeleteCalendarMember($row->dav_name) === false ) {
     dbg_error_log('ERROR', 'Could not delete calendar member %s for %s',
-                                    $row->dav_name(), $attendee->Value());
+                                    $row->dav_name, $attendee->Value());
     trace_bug('Failed to write scheduling resource.');
     return '5.2';
   }