diff --git a/pkgs/development/libraries/kde-frameworks/kio/default.nix b/pkgs/development/libraries/kde-frameworks/kio/default.nix
index 29263c19daaf..12df0496a946 100644
--- a/pkgs/development/libraries/kde-frameworks/kio/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kio/default.nix
@@ -1,7 +1,7 @@
 {
   stdenv, lib, mkDerivation, fetchpatch,
   extra-cmake-modules, kdoctools, qttools,
-  acl, attr, libkrb5, util-linux ? null,
+  acl, attr, libkrb5, util-linux,
   karchive, kbookmarks, kcompletion, kconfig, kconfigwidgets, kcoreaddons,
   kdbusaddons, ki18n, kiconthemes, kitemviews, kjobwidgets, knotifications,
   kservice, ktextwidgets, kwallet, kwidgetsaddons, kwindowsystem, kxmlgui,