diff --git a/sshuttle/client.py b/sshuttle/client.py
index d85ce08..4b4c89c 100644
--- a/sshuttle/client.py
+++ b/sshuttle/client.py
@@ -547,11 +547,15 @@ def main(listenip_v6, listenip_v4,
         else:
             listenip_v6 = None
 
-    required.ipv6 = len(subnets_v6) > 0 or len(nslist_v6) > 0 \
-        or listenip_v6 is not None
+    required.ipv6 = len(subnets_v6) > 0 or listenip_v6 is not None
     required.udp = avail.udp
     required.dns = len(nslist) > 0
 
+    # if IPv6 not supported, ignore IPv6 DNS servers
+    if not required.ipv6:
+        nslist_v6 = []
+        nslist = nslist_v4
+
     fw.method.assert_features(required)
 
     if required.ipv6 and listenip_v6 is None: