diff --git a/PKGBUILD b/PKGBUILD
index 59022fd..4df5fec 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -13,10 +13,12 @@ arch=('i686' 'x86_64')
 makedepends=('systemd' 'python')
 license=('GPL2')
 options=('strip' 'debug')
-source=("https://www.kernel.org/pub/linux/utils/util-linux/v2.25/$pkgname-$pkgver.tar.xz"
+validpgpkeys=('B0C64D14301CC6EFAEDF60E4E4B71D5EEC39C284') # Karel Zak
+source=("https://www.kernel.org/pub/linux/utils/util-linux/v2.25/${pkgname}-${pkgver}.tar."{xz,sign}
         uuidd.tmpfiles
         pam-{login,common,su})
 md5sums=('cab3d7be354000f629bc601238b629b3'
+         'SKIP'
          'a39554bfd65cccfd8254bb46922f4a67'
          '4368b3f98abd8a32662e094c54e7f9b1'
          'a31374fef2cba0ca34dfc7078e2969e4'