BerVarray memberof;
        memberof_is_t what;
 } memberof_cbinfo_t;
-       
+
+static void
+memberof_set_backend( Operation *op_target, Operation *op, slap_overinst *on )
+{
+    BackendInfo *bi = op->o_bd->bd_info;
+
+    if ( bi->bi_type == memberof.on_bi.bi_type )
+        op_target->o_bd->bd_info = (BackendInfo *)on->on_info;
+}
+
 static int
 memberof_isGroupOrMember_cb( Operation *op, SlapReply *rs )
 {
                op2.ors_filterstr = mo->mo_groupFilterstr;
                op2.ors_filter = &mo->mo_groupFilter;
 
-               op2.o_bd->bd_info = (BackendInfo *)on->on_info;
+               memberof_set_backend( &op2, op, on );
                (void)op->o_bd->be_search( &op2, &rs2 );
                op2.o_bd->bd_info = bi;
 
                op2.ors_filterstr = mo->mo_memberFilterstr;
                op2.ors_filter = &mo->mo_memberFilter;
 
-               op2.o_bd->bd_info = (BackendInfo *)on->on_info;
+               memberof_set_backend( &op2, op, on );
                (void)op->o_bd->be_search( &op2, &rs2 );
                op2.o_bd->bd_info = bi;
 
 
                oex.oe_key = (void *)&memberof;
                LDAP_SLIST_INSERT_HEAD(&op2.o_extra, &oex, oe_next);
-               op2.o_bd->bd_info = (BackendInfo *)on->on_info;
+               memberof_set_backend( &op2, op, on );
                (void)op->o_bd->be_modify( &op2, &rs2 );
                op2.o_bd->bd_info = bi;
                LDAP_SLIST_REMOVE(&op2.o_extra, &oex, OpExtra, oe_next);
 
                oex.oe_key = (void *)&memberof;
                LDAP_SLIST_INSERT_HEAD(&op2.o_extra, &oex, oe_next);
-               op2.o_bd->bd_info = (BackendInfo *)on->on_info;
+               memberof_set_backend( &op2, op, on );
                (void)op->o_bd->be_modify( &op2, &rs2 );
                op2.o_bd->bd_info = bi;
                LDAP_SLIST_REMOVE(&op2.o_extra, &oex, OpExtra, oe_next);