diff --git a/addons/google_calendar/utils/google_calendar.py b/addons/google_calendar/utils/google_calendar.py
index f1abb8cb4be..8e81fb532e0 100644
--- a/addons/google_calendar/utils/google_calendar.py
+++ b/addons/google_calendar/utils/google_calendar.py
@@ -78,7 +78,7 @@ class GoogleCalendarService():
     def patch(self, event_id, values, token=None, timeout=TIMEOUT):
         url = "/calendar/v3/calendars/primary/events/%s?sendUpdates=all" % event_id
         headers = {'Content-type': 'application/json', 'Authorization': 'Bearer %s' % token}
-        self.google_service._do_request(url, json.dumps(values), headers, method='PUT', timeout=timeout)
+        self.google_service._do_request(url, json.dumps(values), headers, method='PATCH', timeout=timeout)
 
     @requires_auth_token
     def delete(self, event_id, token=None, timeout=TIMEOUT):