diff --git a/nixos/modules/services/x11/redshift.nix b/nixos/modules/services/x11/redshift.nix
index 332d742a1416..02416f5ef129 100644
--- a/nixos/modules/services/x11/redshift.nix
+++ b/nixos/modules/services/x11/redshift.nix
@@ -38,12 +38,12 @@ in {
     services.redshift.brightness = {
       day = mkOption {
         description = "Screen brightness to apply during the day (between 0.1 and 1.0)";
-        default = 1;
+        default = "1";
         type = types.uniq types.string;
       };
       night = mkOption {
         description = "Screen brightness to apply during the night (between 0.1 and 1.0)";
-        default = 1;
+        default = "1";
         type = types.uniq types.string;
       };
     };