diff --git a/include/fc/reflect/typename.hpp b/include/fc/reflect/typename.hpp
index 64f57bc..7b3276a 100644
--- a/include/fc/reflect/typename.hpp
+++ b/include/fc/reflect/typename.hpp
@@ -4,6 +4,8 @@
 namespace fc {
   class value;
   class exception;
+  namespace ip { class address; }
+
   template<typename T> class get_typename{};
   template<> struct get_typename<int32_t>  { static const char* name()  { return "int32_t";  } };
   template<> struct get_typename<int64_t>  { static const char* name()  { return "int64_t";  } };