*** sequence/sequence.c
--- sequence/sequence.c
***************
*** 196,202 ****
  	if ((ret = __db_get_flags(dbp, &tflags)) != 0)
  		goto err;
  
! 	if (DB_IS_READONLY(dbp)) {
  		ret = __db_rdonly(dbp->dbenv, "DB_SEQUENCE->open");
  		goto err;
  	}
--- 196,206 ----
  	if ((ret = __db_get_flags(dbp, &tflags)) != 0)
  		goto err;
  
! 	/*
! 	 * We can let replication clients open sequences, but must
! 	 * check later that they do not update them.
! 	 */
! 	if (F_ISSET(dbp, DB_AM_RDONLY)) {
  		ret = __db_rdonly(dbp->dbenv, "DB_SEQUENCE->open");
  		goto err;
  	}
***************
*** 252,257 ****
--- 256,266 ----
  		if ((ret != DB_NOTFOUND && ret != DB_KEYEMPTY) ||
  		    !LF_ISSET(DB_CREATE))
  			goto err;
+ 		if (IS_REP_CLIENT(dbenv) &&
+ 		    !F_ISSET(dbp, DB_AM_NOT_DURABLE)) {
+ 			ret = __db_rdonly(dbenv, "DB_SEQUENCE->open");
+ 			goto err;
+ 		}
  		ret = 0;
  
  		rp = &seq->seq_record;
***************
*** 304,310 ****
  	 */
  	rp = seq->seq_data.data;
  	if (rp->seq_version == DB_SEQUENCE_OLDVER) {
! oldver:		rp->seq_version = DB_SEQUENCE_VERSION;
  		if (__db_isbigendian()) {
  			if (IS_DB_AUTO_COMMIT(dbp, txn)) {
  				if ((ret =
--- 313,324 ----
  	 */
  	rp = seq->seq_data.data;
  	if (rp->seq_version == DB_SEQUENCE_OLDVER) {
! oldver:		if (IS_REP_CLIENT(dbenv) &&
! 		    !F_ISSET(dbp, DB_AM_NOT_DURABLE)) {
! 			ret = __db_rdonly(dbenv, "DB_SEQUENCE->open");
! 			goto err;
! 		}
! 		rp->seq_version = DB_SEQUENCE_VERSION;
  		if (__db_isbigendian()) {
  			if (IS_DB_AUTO_COMMIT(dbp, txn)) {
  				if ((ret =
***************
*** 713,718 ****
--- 727,738 ----
  
  	MUTEX_LOCK(dbenv, seq->mtx_seq);
  
+ 	if (handle_check && IS_REP_CLIENT(dbenv) &&
+ 	    !F_ISSET(dbp, DB_AM_NOT_DURABLE)) {
+ 		ret = __db_rdonly(dbenv, "DB_SEQUENCE->get");
+ 		goto err;
+ 	}
+ 
  	if (rp->seq_min + delta > rp->seq_max) {
  		__db_errx(dbenv, "Sequence overflow");
  		ret = EINVAL;