diff --git a/cyrus-imapd.cron-daily b/cyrus-imapd.cron-daily
index 1f55aa8..e973692 100644
--- a/cyrus-imapd.cron-daily
+++ b/cyrus-imapd.cron-daily
@@ -30,7 +30,7 @@ done
 [ -f ${MBOXLIST}.gz ] && mv -f ${MBOXLIST}.gz ${MBOXLIST}.1.gz
 
 # export mailboxes.db
-$RUNUSER - cyrus -c "umask 077 < /dev/null ; /usr/lib/cyrus-imapd/ctl_mboxlist -d | gzip > ${MBOXLIST}.gz"
+$RUNUSER - cyrus -s /bin/sh -c "umask 077 < /dev/null ; /usr/lib/cyrus-imapd/ctl_mboxlist -d | gzip > ${MBOXLIST}.gz"
 
 exit 0
 # EOF
diff --git a/cyrus-imapd.spec b/cyrus-imapd.spec
index b24587f..24033b7 100644
--- a/cyrus-imapd.spec
+++ b/cyrus-imapd.spec
@@ -1,6 +1,6 @@
 Name: cyrus-imapd
 Version: 2.3.15
-Release: 5%{?dist}
+Release: 6%{?dist}
 
 # ********************** BUILD TIME OPTIONS START **********************
 
@@ -736,6 +736,9 @@ fi
 %{_mandir}/man1/*
 
 %changelog
+* Fri Dec 04 2009 Michal Hlavinka <mhlavink@redhat.com> - 2.3.15-6
+- fix cyrus shell for daily cron job (#544182)
+
 * Fri Nov 06 2009 Michal Hlavinka <mhlavink@redhat.com> - 2.3.15-5
 - fix sourcing of /etc/sysconfig/cyrus-imapd (#533320)