diff --git a/caldav/server.go b/caldav/server.go
index 7ddfffc..95ee691 100644
--- a/caldav/server.go
+++ b/caldav/server.go
@@ -563,6 +563,9 @@ func (b *backend) propFindCalendar(ctx context.Context, propfind *internal.PropF
 			Size: cal.MaxResourceSize,
 		})
 	}
+	props[internal.CurrentUserPrivilegeSetName] = func(*internal.RawXMLValue) (interface{}, error) {
+		return &internal.CurrentUserPrivilegeSet{Privilege: internal.NewAllPrivileges()}, nil
+	}
 
 	// TODO: CALDAV:calendar-timezone, CALDAV:supported-calendar-component-set, CALDAV:min-date-time, CALDAV:max-date-time, CALDAV:max-instances, CALDAV:max-attendees-per-instance