diff --git a/redfish-core/lib/network_protocol.hpp b/redfish-core/lib/network_protocol.hpp
index c3165ee..e3698ce 100644
--- a/redfish-core/lib/network_protocol.hpp
+++ b/redfish-core/lib/network_protocol.hpp
@@ -466,7 +466,7 @@
     return objPath.str;
 }
 
-void handleBmcNetworkProtocolHead(
+inline void handleBmcNetworkProtocolHead(
     crow::App& app, const crow::Request& req,
     const std::shared_ptr<bmcweb::AsyncResp>& asyncResp)
 {