diff --git a/source/_integrations/calendar.markdown b/source/_integrations/calendar.markdown
index 3af6368dcd9..c42fb088fea 100644
--- a/source/_integrations/calendar.markdown
+++ b/source/_integrations/calendar.markdown
@@ -2,6 +2,7 @@
 title: Calendar
 description: Instructions on how to integrate calendars within Home Assistant.
 ha_release: 0.33
+ha_iot_class: ~
 ha_domain: calendar
 ---