diff --git a/src/adjacent.hpp b/src/adjacent.hpp
index cbfb0fa..5b14394 100644
--- a/src/adjacent.hpp
+++ b/src/adjacent.hpp
@@ -89,6 +89,9 @@
   bool
   compare(const ndn::Name& adjacencyName);
 
+  void
+  writeLog();
+
 public:
   static const float DEFAULT_LINK_COST;