diff --git a/misc/build.func b/misc/build.func
index e2baf4e06..4b61dd896 100644
--- a/misc/build.func
+++ b/misc/build.func
@@ -334,6 +334,7 @@ base_settings() {
   BRG="vmbr0"
   NET="dhcp"
   IPv6="auto"
+  IPv6GW=""
   GATE=""
   IPv6GW=""
   APT_CACHER=""