diff --git a/libftdi.spec b/libftdi.spec
index b0efc50..722fc15 100644
--- a/libftdi.spec
+++ b/libftdi.spec
@@ -1,7 +1,7 @@
 %{!?python_sitearch: %global python_sitearch %(%{__python} -c "from distutils.sysconfig import get_python_lib; print get_python_lib(1)")}
 Name:		libftdi
 Version:	0.16
-Release:	6%{?dist}
+Release:	7%{?dist}
 Summary:	Library to program and control the FTDI USB controller
 
 Group:		System Environment/Libraries
@@ -14,6 +14,8 @@ BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 BuildRequires:	libusb-devel, doxygen, boost-devel, python-devel, swig
 Requires:	pkgconfig, udev
+Requires(pre):	shadow-utils
+
 
 %package devel
 Summary:	Header files and static libraries for libftdi
@@ -123,6 +125,8 @@ rm -rf $RPM_BUILD_ROOT
 %{_includedir}/*.hpp
 %{_libdir}/pkgconfig/libftdipp.pc
 
+%pre
+getent group GROUPNAME >/dev/null || groupadd -r plugdev
 
 %post -p /sbin/ldconfig
 %postun -p /sbin/ldconfig
@@ -131,6 +135,9 @@ rm -rf $RPM_BUILD_ROOT
 %postun c++ -p /sbin/ldconfig
 
 %changelog
+* Sat Aug 22 2009 Lucian Langa <cooly@gnome.eu.org> - 0.16-7
+- add group for udev rule (#517773)
+
 * Fri Jul 31 2009 Lucian Langa <cooly@gnome.eu.org> - 0.16-6
 - rebuilt with modified patch