diff --git a/router/java/src/net/i2p/router/transport/udp/UDPTransport.java b/router/java/src/net/i2p/router/transport/udp/UDPTransport.java
index badf8781b..4f2daff3a 100644
--- a/router/java/src/net/i2p/router/transport/udp/UDPTransport.java
+++ b/router/java/src/net/i2p/router/transport/udp/UDPTransport.java
@@ -826,7 +826,7 @@ public class UDPTransport extends TransportImpl implements TimedWeightedPriority
         // must be after pusher and setting external addresses
         _establisher.startup();
         _handler.startup();
-        rebuildExternalAddress(false, false);
+        rebuildExternalAddress(false, v6only);
     }
     
     public synchronized void shutdown() {