diff --git a/profiles/features/prefix/package.use.mask b/profiles/features/prefix/package.use.mask
index 322b21030686e..3ccb0aa58a784 100644
--- a/profiles/features/prefix/package.use.mask
+++ b/profiles/features/prefix/package.use.mask
@@ -2,6 +2,10 @@
 # Distributed under the terms of the GNU General Public License v2
 # $Id$
 
+# Benda Xu <heroxbd@gentoo.org> (28 Jul 2016)
+# Needs root privilege.
+sys-fs/eudev hwdb kmod firmware-loader
+
 # Kacper Kowalik <xarthisius@gentoo.org> (14 Jan 2012)
 # sci-libs/mkl don't have prefix keywords
 dev-python/numexpr mkl