diff --git a/hosts/unas/modules/time-machine.nix b/hosts/unas/modules/time-machine.nix
index bbf3a2f7..e0db4ac9 100644
--- a/hosts/unas/modules/time-machine.nix
+++ b/hosts/unas/modules/time-machine.nix
@@ -18,7 +18,7 @@
 
     avahi = {
       enable = true;
-      nssmdns = true;
+      nssmdns4 = true;
 
       publish = {
         enable = true;