diff --git a/pkgs/development/libraries/libusb1/default.nix b/pkgs/development/libraries/libusb1/default.nix
index 33cd34ea5a0e..d69c8d670c4a 100644
--- a/pkgs/development/libraries/libusb1/default.nix
+++ b/pkgs/development/libraries/libusb1/default.nix
@@ -3,14 +3,12 @@
 , autoreconfHook
 , pkg-config
 , enableUdev ? stdenv.isLinux && !stdenv.hostPlatform.isMusl
-, udev ? null
+, udev
 , libobjc
 , IOKit
 , withStatic ? false
 }:
 
-assert enableUdev -> udev != null;
-
 stdenv.mkDerivation rec {
   pname = "libusb";
   version = "1.0.24";