diff --git a/modules/hardware/nvidia/default.nix b/modules/hardware/nvidia/default.nix
index 9a13f7e6..3f8f2c6f 100644
--- a/modules/hardware/nvidia/default.nix
+++ b/modules/hardware/nvidia/default.nix
@@ -8,7 +8,6 @@
 }:
 with lib; let
   cfg = config.modules.hardware.nvidia;
-  busIDType = lib.types.strMatching "([[:print:]]+[\:\@][0-9]{1,3}\:[0-9]{1,2}\:[0-9])?";
 in {
   imports = [
     ./prime.nix