diff --git a/redfish-core/lib/ethernet.hpp b/redfish-core/lib/ethernet.hpp
index 0bfe9db..8d7eddc 100644
--- a/redfish-core/lib/ethernet.hpp
+++ b/redfish-core/lib/ethernet.hpp
@@ -1019,9 +1019,9 @@
                                     messages::internalError(asyncResp->res);
                                     return;
                                 }
-                                asyncResp->res
-                                    .jsonValue["IPv4Addresses"][std::to_string(
-                                        entryIdx)]["Address"] = address;
+                                asyncResp->res.jsonValue["IPv4Addresses"]
+                                                        [entryIdx]["Address"] =
+                                    address;
                             };
 
                         crow::connections::systemBus->async_method_call(
@@ -1058,9 +1058,8 @@
                                     messages::internalError(asyncResp->res);
                                     return;
                                 }
-                                asyncResp->res
-                                    .jsonValue["IPv4Addresses"][std::to_string(
-                                        entryIdx)]["Gateway"] =
+                                asyncResp->res.jsonValue["IPv4Addresses"]
+                                                        [entryIdx]["Gateway"] =
                                     std::move(gateway);
                             };