diff --git a/modules/openstack_project/files/reprepro/reprepro-mirror-update.sh b/modules/openstack_project/files/reprepro/reprepro-mirror-update.sh
index 4f86f583a4..e4c5a898c7 100644
--- a/modules/openstack_project/files/reprepro/reprepro-mirror-update.sh
+++ b/modules/openstack_project/files/reprepro/reprepro-mirror-update.sh
@@ -31,7 +31,7 @@ if [ -f $UNREF_FILE ] ; then
 fi
 
 echo "Saving list of newly unreferenced files for next time"
-$REPREPRO dumpunreferenced > $UNREF_FILE
+k5start -t -f /etc/reprepro.keytab service/reprepro -- bash -c "reprepro --confdir $REPREPRO_CONFIG dumpunreferenced > $UNREF_FILE"
 
 echo "Checking state of mirror"
 $REPREPRO checkpool fast