diff --git a/modules/system/ntsync.nix b/modules/system/ntsync.nix
index ab7f127..f57226c 100644
--- a/modules/system/ntsync.nix
+++ b/modules/system/ntsync.nix
@@ -7,6 +7,11 @@
     cfg = config.hive.ntsync;
   in {
     options.hive.ntsync.enable = lib.mkEnableOption "Enable the nt-sync kernel driver.";
+    options.hive.ntsync.proton = lib.mkOption {
+      description = "Make proton use ntsync";
+      default = true;
+      type = lib.types.bool;
+    };
 
     config = lib.mkIf cfg.enable {
       assertions = [
@@ -17,6 +22,10 @@
       ];
 
       boot.kernelModules = ["ntsync"];
+
+      environment.variables = lib.optionalAttrs cfg.proton {
+        PROTON_USE_NTSYNC = 1;
+      };
     };
   };
 }