diff --git a/doc/openvpn.8 b/doc/openvpn.8
index 864f94e8..74638cf3 100644
--- a/doc/openvpn.8
+++ b/doc/openvpn.8
@@ -4767,8 +4767,10 @@ option of
 .B \-hash
 option of
 .B openssl x509
-and
+,
 .B openssl crl
+and
+.BR X509_LOOKUP_hash_dir (3)
 for more information.
 
 Similarly to the