diff --git a/redfish-core/lib/ethernet.hpp b/redfish-core/lib/ethernet.hpp
index 70e5536..0bfe9db 100644
--- a/redfish-core/lib/ethernet.hpp
+++ b/redfish-core/lib/ethernet.hpp
@@ -1228,8 +1228,10 @@
         {
             return;
         }
-        std::optional<uint64_t> vlanId = 0;
-        std::optional<bool> vlanEnable = false;
+
+        std::optional<uint64_t> vlanId;
+        std::optional<bool> vlanEnable;
+
         if (vlan)
         {
             if (!json_util::readJson(*vlan, res, "VLANEnable", vlanEnable,