diff --git a/src/session_impl.cpp b/src/session_impl.cpp
index 4a0951b5e..9d4f34729 100644
--- a/src/session_impl.cpp
+++ b/src/session_impl.cpp
@@ -5470,7 +5470,7 @@ namespace aux {
 		if (is_v6(s.local_endpoint) && is_local(s.local_endpoint.address()))
 			return;
 
-		if (!s.natpmp_mapper)
+		if (!s.natpmp_mapper && (s.flags & listen_socket_t::has_gateway))
 		{
 			// the natpmp constructor may fail and call the callbacks
 			// into the session_impl.