diff --git a/calendar/inc/class.calendar_wizard_export_csv.inc.php b/calendar/inc/class.calendar_wizard_export_csv.inc.php
index a2967ee591..03b1f17647 100644
--- a/calendar/inc/class.calendar_wizard_export_csv.inc.php
+++ b/calendar/inc/class.calendar_wizard_export_csv.inc.php
@@ -16,6 +16,11 @@ class calendar_wizard_export_csv extends importexport_wizard_basic_export_csv
 		// Field mapping
 		$bo = new calendar_tracking();
 		$this->export_fields = array('id' => 'Calendar ID') + $bo->field2label;
+
+		// These are not valid:
+		unset($this->export_fields['participants-c']);
+		unset($this->export_fields['participants-r']);
+
 		$custom = config::get_customfields('calendar', true);
 		foreach($custom as $name => $data) {
 			$this->export_fields['#'.$name] = $data['label'];
diff --git a/calendar/setup/importexport_default.xml b/calendar/setup/importexport_default.xml
index da8f25f8df..8e8234054f 100644
--- a/calendar/setup/importexport_default.xml
+++ b/calendar/setup/importexport_default.xml
@@ -33,7 +33,6 @@
           <entry type="string" name="start">start</entry>
           <entry type="string" name="end">end</entry>
           <entry type="string" name="participants">Participants: User, Status, Role</entry>
-          <entry type="string" name="participants-c">Participants: User, Status, Quantity, Role</entry>
           <entry type="string" name="all_custom_fields">calendar</entry>
         </entry>
         <entry type="string" name="delimiter">;</entry>