diff --git a/src/bt_peer_connection.cpp b/src/bt_peer_connection.cpp
index 61f7c4f6d..76038812b 100644
--- a/src/bt_peer_connection.cpp
+++ b/src/bt_peer_connection.cpp
@@ -123,7 +123,7 @@ namespace {
 	bool ut_pex_peer_store::was_introduced_by(tcp::endpoint const &ep)
 	{
 #if TORRENT_USE_IPV6
-		if (ep.address().is_v4())
+		if (ep.protocol() == tcp::v4())
 		{
 #endif
 			peers4_t::value_type const v(ep.address().to_v4().to_bytes(), ep.port());