--- connections/tuntap.orig	2013-03-27 14:31:45.000000000 -0700
+++ connections/tuntap	2013-04-13 16:33:38.218417525 -0700
@@ -10,7 +10,7 @@
         return 1
     else
         ip tuntap add dev "$Interface" mode "$Mode" \
-            user "$User" group "$Group"
+            ${User:+user} $User ${Group:+group} $Group
     fi
     bring_interface_up "$Interface"
     IP=${IP-no} ip_set