diff --git a/nixos/modules/services/audio/mpd.nix b/nixos/modules/services/audio/mpd.nix
index 909f78d9a04e..1801bdc989d8 100644
--- a/nixos/modules/services/audio/mpd.nix
+++ b/nixos/modules/services/audio/mpd.nix
@@ -26,7 +26,9 @@ let
           "\"" + (toString v) + "\""
       )
     ) a;
-  nonBlockSettings = lib.filterAttrs (n: v: !(builtins.isAttrs v || builtins.isList v)) cfg.settings;
+  nonBlockSettings = lib.filterAttrs (
+    n: v: !(builtins.isAttrs v || builtins.isList v || isNull v)
+  ) cfg.settings;
   pureBlockSettings = removeAttrs cfg.settings (builtins.attrNames nonBlockSettings);
   blocks =
     pureBlockSettings
@@ -221,7 +223,7 @@ in
             };
 
             db_file = lib.mkOption {
-              type = lib.types.path;
+              type = lib.types.nullOr lib.types.path;
               default = "${cfg.dataDir}/tag_cache";
               defaultText = lib.literalExpression ''"''${dataDir}/tag_cache"'';
               description = ''