diff --git a/nixos/modules/services/audio/mopidy.nix b/nixos/modules/services/audio/mopidy.nix
index 9981b065f28..029b14ab472 100644
--- a/nixos/modules/services/audio/mopidy.nix
+++ b/nixos/modules/services/audio/mopidy.nix
@@ -47,6 +47,7 @@ in {
       };
 
       configuration = mkOption {
+        default = "";
         type = types.lines;
         description = ''
           The configuration that Mopidy should use.