diff --git a/src/route/nexthop-list.hpp b/src/route/nexthop-list.hpp
index 2607218..8e7843d 100644
--- a/src/route/nexthop-list.hpp
+++ b/src/route/nexthop-list.hpp
@@ -50,6 +50,9 @@
     return m_nexthopList;
   }
 
+  void
+  writeLog();
+
 private:
   std::list<NextHop> m_nexthopList;
 };