diff --git a/lib/fudo/hosts.nix b/lib/fudo/hosts.nix
index 26da7f1..7986484 100644
--- a/lib/fudo/hosts.nix
+++ b/lib/fudo/hosts.nix
@@ -144,7 +144,7 @@ in {
         };
       };
 
-      client.dns.password-file = mkIf (backplane-passwd != null)
+      client.dns.password-file = mkIf (backplane-passwd-source != null)
         backplane-passwd-target;
     };