diff --git a/toggl_api.md b/toggl_api.md
index c6798a8..ccc6659 100644
--- a/toggl_api.md
+++ b/toggl_api.md
@@ -19,7 +19,7 @@ Example request
 ```shell
 curl -v -u 1971800d4d82861d8f2c1651fea4d212:api_token \
 	-H 'Content-type: application/json' \
-	-d '{"time_entry":{"description":"New time entry","created_with":"API example code","start":"2012-02-12T15:35:47+02:00","wid":{"id":31366}}}' \
+	-d '{"time_entry":{"description":"New time entry","created_with":"API example code","start":"2012-02-12T15:35:47+02:00","duration":1200,"wid":{"id":31366}}}' \
 	 -X POST https://www.toggl.com/api/v8/time_entries
 
 ```