diff --git a/docs/user-guide/nginx-configuration/configmap.md b/docs/user-guide/nginx-configuration/configmap.md
index 7038ca90d..fd5f5281e 100644
--- a/docs/user-guide/nginx-configuration/configmap.md
+++ b/docs/user-guide/nginx-configuration/configmap.md
@@ -537,7 +537,7 @@ Example for json output:
 
 log-format-upstream: '{"time": "$time_iso8601", "remote_addr": "$proxy_protocol_addr", "x_forwarded_for": "$proxy_add_x_forwarded_for", "request_id": "$req_id",
   "remote_user": "$remote_user", "bytes_sent": $bytes_sent, "request_time": $request_time, "status": $status, "vhost": "$host", "request_proto": "$server_protocol",
-  "path": "$uri", "request_query": "$args", "request_length": $request_length, "duration": $request_time,"method": "$request_method", "http_referrer": "$http_referer",
+  "path": "$uri", "request_query": "$args", "request_length": $request_length, "method": "$request_method", "http_referrer": "$http_referer",
   "http_user_agent": "$http_user_agent" }'
 ```