diff --git a/modules/programs/mangohud.nix b/modules/programs/mangohud.nix
index a62587a2..035a4744 100644
--- a/modules/programs/mangohud.nix
+++ b/modules/programs/mangohud.nix
@@ -13,7 +13,7 @@ let
       int = toString option;
       float = int;
       path = int;
-      bool = "false";
+      bool = "0"; # "on/off" opts are disabled with `=0`
       string = option;
       list = concatStringsSep "," (lists.forEach option (x: toString x));
     }.${builtins.typeOf option};
diff --git a/tests/modules/programs/mangohud/basic-configuration.conf b/tests/modules/programs/mangohud/basic-configuration.conf
index 8ded2dbc..87ecec5d 100644
--- a/tests/modules/programs/mangohud/basic-configuration.conf
+++ b/tests/modules/programs/mangohud/basic-configuration.conf
@@ -6,7 +6,7 @@ cpu_stats
 cpu_temp
 cpu_text=CPU
 fps_limit=30,60
-legacy_layout=false
+legacy_layout=0
 media_player_name=spotify
 media_player_order=title,artist,album
 output_folder=/home/user/Documents/mangohud