diff --git a/squid.spec b/squid.spec
index 748e75a..208cfa0 100644
--- a/squid.spec
+++ b/squid.spec
@@ -4,7 +4,7 @@
 
 Name:     squid
 Version:  3.1.8
-Release:  1%{?dist}
+Release:  2%{?dist}
 Summary:  The Squid proxy caching server
 Epoch:    7
 License:  GPLv2
@@ -251,8 +251,17 @@ if [ "$1" -ge "1" ] ; then
         service squid condrestart >/dev/null 2>&1
 fi
 
+%triggerin -- samba-common
+if ! getent group wbpriv >/dev/null 2>&1 ; then
+  /usr/sbin/groupadd -g 88 wbpriv >/dev/null 2>&1 || :
+fi
+/usr/sbin/usermod -a -G wbpriv squid >/dev/null 2>&1 || \
+    chgrp squid /var/cache/samba/winbindd_privileged >/dev/null 2>&1 || :
 
 %changelog
+* Wed Oct 13 2010 Jiri Skala <jskala@redhat.com> - 7:3.1.8-2
+- fixes #584161 - squid userid not added to wbpriv group
+
 * Sun Sep 05 2010 Henrik Nordstrom <henrik@henriknordstrom.net> - 7:3.1.8-1
 - Bug #630445: SQUID-2010:3 Denial of service issue