diff --git a/system_configuration.hpp b/system_configuration.hpp
index 9e76dca..a29309c 100644
--- a/system_configuration.hpp
+++ b/system_configuration.hpp
@@ -45,13 +45,20 @@
      */
     std::string hostName(std::string name) override;
 
-    /** @brief set the default gateway of the system.
-     *  @param[in] gateway - default gateway of the system.
+    /** @brief set the default v4 gateway of the system.
+     *  @param[in] gateway - default v4 gateway of the system.
      */
     std::string defaultGateway(std::string gateway) override;
 
     using SystemConfigIntf::defaultGateway;
 
+    /** @brief set the default v6 gateway of the system.
+     *  @param[in] gateway - default v6 gateway of the system.
+     */
+    std::string defaultGateway6(std::string gateway) override;
+
+    using SystemConfigIntf::defaultGateway6;
+
   private:
     /** @brief get the hostname from the system by doing
      *         dbus call to hostnamed service.