diff --git a/unix/x0vncserver/x0vncserver.cxx b/unix/x0vncserver/x0vncserver.cxx
index ec2fd76..771f21c 100644
--- a/unix/x0vncserver/x0vncserver.cxx
+++ b/unix/x0vncserver/x0vncserver.cxx
@@ -447,7 +447,7 @@
     QueryConnHandler qcHandler(dpy, &server);
     server.setQueryConnectionHandler(&qcHandler);
 
-    TcpListener listener((int)rfbport);
+    TcpListener listener(NULL, (int)rfbport);
     vlog.info("Listening on port %d", (int)rfbport);
 
     const char *hostsData = hostsFile.getData();