diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c
index 406af3b1503..6b54a011193 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c
@@ -20,7 +20,7 @@
  */
 /*
  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
+ * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
  */
 
 #include <sys/dsl_scan.h>
@@ -102,6 +102,11 @@ SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, free_max_blocks, CTLFLAG_RWTUN,
 
 extern int zfs_txg_timeout;
 
+/*
+ * Enable/disable the processing of the free_bpobj object.
+ */
+boolean_t zfs_free_bpobj_enabled = B_TRUE;
+
 /* the order has to match pool_scan_type */
 static scan_cb_t *scan_funcs[POOL_SCAN_FUNCS] = {
 	NULL,
@@ -1451,7 +1456,8 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
 	 * have to worry about traversing it.  It is also faster to free the
 	 * blocks than to scrub them.
 	 */
-	if (spa_version(dp->dp_spa) >= SPA_VERSION_DEADLISTS) {
+	if (zfs_free_bpobj_enabled &&
+	    spa_version(dp->dp_spa) >= SPA_VERSION_DEADLISTS) {
 		scn->scn_is_bptree = B_FALSE;
 		scn->scn_zio_root = zio_root(dp->dp_spa, NULL,
 		    NULL, ZIO_FLAG_MUSTSUCCEED);