diff --git a/nixos/modules/services/audio/mpd.nix b/nixos/modules/services/audio/mpd.nix
index 47b2bd1d4dd8..e6b525c4b1ba 100644
--- a/nixos/modules/services/audio/mpd.nix
+++ b/nixos/modules/services/audio/mpd.nix
@@ -19,7 +19,7 @@ let
     ${if cfg.network.host != "any" then
    "bind_to_address     ${cfg.network.host}" else ""}
     ${if cfg.network.port != 6600 then
-   "port                ${cfg.network.port.toString()}" else ""}
+   "port                ${toString cfg.network.port}" else ""}
     ${cfg.extraConfig}
   '';