diff --git a/calendar/inc/class.calendar_so.inc.php b/calendar/inc/class.calendar_so.inc.php
index faf4fae8b8..463fb967a9 100644
--- a/calendar/inc/class.calendar_so.inc.php
+++ b/calendar/inc/class.calendar_so.inc.php
@@ -500,7 +500,7 @@ class calendar_so
 				$countSelects = count($selects);
 				foreach(array_keys($selects) as $key)
 				{
-					$selects[$key]['cols'] = "DISTINCT $this->repeats_table.recur_type,$this->repeats_table.recur_enddate,$this->repeats_table.recur_interval,$this->repeats_table.recur_data,$this->repeats_table.recur_exception,".$this->db->to_varchr($this->cal_table.'.cal_id').",cal_start,cal_end,cal_recur_date";
+					$selects[$key]['cols'] = "DISTINCT $this->repeats_table.recur_type,$this->repeats_table.recur_enddate,$this->repeats_table.recur_interval,$this->repeats_table.recur_data,$this->repeats_table.recur_exception,".$this->db->to_varchar($this->cal_table.'.cal_id').",cal_start,cal_end,cal_recur_date";
 					//$selects[0]['cols'] = $selects[1]['cols'] = "DISTINCT $this->repeats_table.*,$this->cal_table.cal_id,cal_start,cal_end,cal_recur_date";
 				}
 				if (!isset($param['cols'])) self::get_union_selects($selects,$start,$end,$users,$cat_id,$filter,$params['query'],$params['users']);