diff --git a/themes/tsc_vfl/layouts/shortcodes/tsc/calendar/list.html b/themes/tsc_vfl/layouts/shortcodes/tsc/calendar/list.html
index 714d1e49..1b29d31f 100644
--- a/themes/tsc_vfl/layouts/shortcodes/tsc/calendar/list.html
+++ b/themes/tsc_vfl/layouts/shortcodes/tsc/calendar/list.html
@@ -19,6 +19,7 @@
             <tr>
                 <td>
                     {{ .title }}{{ with .subtitle }} - {{ . }}{{ end }}
+                    {{ if (.extern | default false) }}<i>(ext.)</i>{{ end }}
                 </td>
                 <td>
                     {{ with .class }}{{ . }}{{ end }}