diff --git a/servers/slapd/proto-slap.h b/servers/slapd/proto-slap.h
index 58f7da40ab..31b64e6ce9 100644
--- a/servers/slapd/proto-slap.h
+++ b/servers/slapd/proto-slap.h
@@ -893,6 +893,8 @@ LDAP_SLAPD_F (ObjectClass *) oc_find LDAP_P((
 	const char *ocname));
 LDAP_SLAPD_F (ObjectClass *) oc_bvfind LDAP_P((
 	struct berval *ocname));
+LDAP_SLAPD_F (ObjectClass *) oc_bvfind_undef LDAP_P((
+	struct berval *ocname));
 LDAP_SLAPD_F (int) is_object_subclass LDAP_P((
 	ObjectClass *sup,
 	ObjectClass *sub ));