diff --git a/servers/slapd/back-ldap/compare.c b/servers/slapd/back-ldap/compare.c
index 177cd21b6d..51ba276085 100644
--- a/servers/slapd/back-ldap/compare.c
+++ b/servers/slapd/back-ldap/compare.c
@@ -81,7 +81,7 @@ ldap_back_compare(
 	}
 
 	if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass
-		|| op->orc_ava->a_desc == slap_schema.si_ad_structuralObjectClass ) {
+		|| op->orc_ava->aa_desc == slap_schema.si_ad_structuralObjectClass ) {
 		ldap_back_map(&li->rwmap.rwm_oc, &op->orc_ava->aa_value,
 				&mapped_val, BACKLDAP_MAP);
 		if (mapped_val.bv_val == NULL || mapped_val.bv_val[0] == '\0') {