diff --git a/kartei/jan/default.nix b/kartei/jan/default.nix
index 72b5cb331..6b90cfdc4 100644
--- a/kartei/jan/default.nix
+++ b/kartei/jan/default.nix
@@ -39,6 +39,7 @@ in {
     nets = {
       retiolum = {
         ip4.addr = "10.243.143.11";
+        ip6.addr = (lib.krebs.genipv6 "retiolum" "jan" { hostName = "petrosilia"; }).address;
         aliases = [
           "petrosilia.r"
         ];