diff --git a/groups/locations.py b/groups/locations.py
index 353832e..15177f6 100644
--- a/groups/locations.py
+++ b/groups/locations.py
@@ -24,6 +24,12 @@ groups['gce'] = {
             # than our own domains.
             'relayhost': '[rx300.kunbox.net]:2525',
         },
+        'sysctl': {
+            'options': {
+                'net.ipv6.conf.all.disable_ipv6': '1',
+                'net.ipv6.conf.default.disable_ipv6': '1',
+            },
+        },
     },
 }