diff --git a/doc/v3/api_samples/os-multinic/multinic-add-fixed-ip-req.json b/doc/v3/api_samples/os-multinic/multinic-add-fixed-ip-req.json
index 8127b212ccd5..3c17283906c2 100644
--- a/doc/v3/api_samples/os-multinic/multinic-add-fixed-ip-req.json
+++ b/doc/v3/api_samples/os-multinic/multinic-add-fixed-ip-req.json
@@ -1,5 +1,5 @@
 {
-    "addFixedIp":{
-        "networkId": 1
+    "add_fixed_ip":{
+        "network_id": 1
         }
 }
\ No newline at end of file