diff --git a/nixos/hosts/monitoring/default.nix b/nixos/hosts/monitoring/default.nix
index f7ea900..a47cba0 100644
--- a/nixos/hosts/monitoring/default.nix
+++ b/nixos/hosts/monitoring/default.nix
@@ -57,7 +57,7 @@
       {
         job_name = "pve1";
         static_configs = [
-          { targets = [ "192.168.1.128:${port}" ]; }
+          { targets = [ "192.168.1.128:${builtins.toString port}" ]; }
         ];
       }
     ];