diff --git a/servers/slapd/back-ldap/add.c b/servers/slapd/back-ldap/add.c
index 0795212ee2..f17451ad7a 100644
--- a/servers/slapd/back-ldap/add.c
+++ b/servers/slapd/back-ldap/add.c
@@ -140,7 +140,7 @@ ldap_back_add(
 
 		ldap_back_map(&li->at_map, &a->a_desc->ad_cname, &mapped,
 				BACKLDAP_MAP);
-		if (mapped.bv_val == NULL) {
+		if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 			continue;
 		}