--- class3-client.cnf.old2	2018-05-28 11:05:32.188380035 +0200
+++ class3-client.cnf	2018-05-29 11:44:27.252254679 +0200
@@ -31,6 +31,7 @@
 dir             = /etc/ssl/class3       # Where everything is kept
 certs           = $dir/certs            # Where the issued certs are kept
 crl_dir         = $dir/crl              # Where the issued crl are kept
+crlnumber       = $dir/crlnumber        # Where the current CRL-number is stored (bug-1438)
 database        = $dir/index.txt        # database index file.
 new_certs_dir   = $dir/newcerts         # default place for new certs.