diff --git a/makefu/2configs/elchos/search.nix b/makefu/2configs/elchos/search.nix
index 521bfc80a..e7b91e6a8 100644
--- a/makefu/2configs/elchos/search.nix
+++ b/makefu/2configs/elchos/search.nix
@@ -32,7 +32,7 @@ let
       ${user}
 
       protocol=dyndns2
-      usev5=if, if=${primary-itf}
+      usev6=if, if=${primary-itf}
       ssl=yes
       server=ipv6.nsupdate.info
       login=${user}