diff --git a/include/libtorrent/aux_/session_impl.hpp b/include/libtorrent/aux_/session_impl.hpp
index baa91e8c5..e44fcb899 100644
--- a/include/libtorrent/aux_/session_impl.hpp
+++ b/include/libtorrent/aux_/session_impl.hpp
@@ -650,6 +650,7 @@ namespace libtorrent
 			}
 
 			void tracker_response(tracker_request const&
+				, libtorrent::address const& tracker_ip
 				, std::vector<peer_entry>& peers
 				, int interval
 				, int complete