diff --git a/calendar/classes/external/event_exporter_base.php b/calendar/classes/external/event_exporter_base.php
index 08d14acf101..f761f705bcd 100644
--- a/calendar/classes/external/event_exporter_base.php
+++ b/calendar/classes/external/event_exporter_base.php
@@ -275,7 +275,9 @@ class event_exporter_base extends exporter {
         }
         $timesort = $event->get_times()->get_sort_time()->getTimestamp();
         $iconexporter = new event_icon_exporter($event, ['context' => $context]);
-        $values['normalisedeventtypetext'] = get_string('type' . $values['normalisedeventtype'], 'calendar');
+        $identifier = 'type' . $values['normalisedeventtype'];
+        $stringexists = get_string_manager()->string_exists($identifier, 'calendar');
+        $values['normalisedeventtypetext'] = $stringexists ? get_string($identifier, 'calendar') : '';
 
         $values['icon'] = $iconexporter->export($output);
 
diff --git a/calendar/templates/event_details.mustache b/calendar/templates/event_details.mustache
index 86fcda4cc9b..1a1516fef7d 100644
--- a/calendar/templates/event_details.mustache
+++ b/calendar/templates/event_details.mustache
@@ -59,10 +59,12 @@
     <div class="col-xs-1">{{#pix}} i/calendareventtime, core, {{#str}} when, core_calendar {{/str}} {{/pix}}</div>
     <div class="col-xs-11">{{{formattedtime}}}</div>
 </div>
-<div class="row mt-1">
-    <div class="col-xs-1">{{#pix}} i/calendar, core, {{#str}} eventtype, core_calendar {{/str}} {{/pix}}</div>
-    <div class="col-xs-11">{{normalisedeventtypetext}}</div>
-</div>
+{{#normalisedeventtypetext}}
+    <div class="row mt-1">
+        <div class="col-xs-1">{{#pix}} i/calendar, core, {{#str}} eventtype, core_calendar {{/str}} {{/pix}}</div>
+        <div class="col-xs-11">{{normalisedeventtypetext}}</div>
+    </div>
+{{/normalisedeventtypetext}}
 {{#description}}
     <div class="row mt-1">
         <div class="col-xs-1">{{#pix}} i/calendareventdescription, core, {{#str}} description {{/str}} {{/pix}}</div>