diff --git a/xCAT/xCAT.spec b/xCAT/xCAT.spec
index 6266a7303..c81e04fee 100644
--- a/xCAT/xCAT.spec
+++ b/xCAT/xCAT.spec
@@ -168,7 +168,7 @@ if [ "$1" = "1" ]; then #Only if installing for the first time..
       XCATROOT=$RPM_INSTALL_PREFIX0 $RPM_INSTALL_PREFIX0/sbin/chtab key=master site.value=$(getent hosts `hostname`|awk '{print $1}')
       XCATROOT=$RPM_INSTALL_PREFIX0 $RPM_INSTALL_PREFIX0/sbin/chtab key=domain site.value=$(hostname -d)
       XCATROOT=$RPM_INSTALL_PREFIX0 $RPM_INSTALL_PREFIX0/sbin/chtab key=installdir site.value=/install
-      XCATROOT=$RPM_INSTALL_PREFIX0 $RPM_INSTALL_PREFIX0/sbin/chtab key=timezone site.value=`grep ^ZONE /etc/sysconfig/clock|cut -d= -f 2|sed -e 's/"//g'`
+      XCATROOT=$RPM_INSTALL_PREFIX0 $RPM_INSTALL_PREFIX0/sbin/chtab key=timezone site.value=`grep -E "^TIMEZONE|^ZONE" /etc/sysconfig/clock|cut -d= -f 2|sed -e 's/"//g'`
     fi
     if [ ! -r /etc/xcat/postscripts.sqlite ]; then
       XCATROOT=$RPM_INSTALL_PREFIX0 $RPM_INSTALL_PREFIX0/sbin/chtab node=xcatdefaults postscripts.postscripts='syslog,remoteshell'