diff --git a/include/sys/dsl_scan.h b/include/sys/dsl_scan.h
index 032f7f3e2..bcb896da3 100644
--- a/include/sys/dsl_scan.h
+++ b/include/sys/dsl_scan.h
@@ -138,6 +138,7 @@ typedef struct dsl_scan {
 
 	/* per txg statistics */
 	uint64_t scn_visited_this_txg;	/* total bps visited this txg */
+	uint64_t scn_dedup_frees_this_txg;	/* dedup bps freed this txg */
 	uint64_t scn_holes_this_txg;
 	uint64_t scn_lt_min_this_txg;
 	uint64_t scn_gt_max_this_txg;
diff --git a/man/man5/zfs-module-parameters.5 b/man/man5/zfs-module-parameters.5
index 6c0fc0dab..311d898ff 100644
--- a/man/man5/zfs-module-parameters.5
+++ b/man/man5/zfs-module-parameters.5
@@ -1642,6 +1642,17 @@ Default value: \fB1\fR.
 .RS 12n
 Maximum number of blocks freed in a single txg.
 .sp
+Default value: \fBULONG_MAX\fR (unlimited).
+.RE
+
+.sp
+.ne 2
+.na
+\fBzfs_max_async_dedup_frees\fR (ulong)
+.ad
+.RS 12n
+Maximum number of dedup blocks freed in a single txg.
+.sp
 Default value: \fB100,000\fR.
 .RE
 
diff --git a/module/zfs/dsl_scan.c b/module/zfs/dsl_scan.c
index 1c31261bf..3579f71d7 100644
--- a/module/zfs/dsl_scan.c
+++ b/module/zfs/dsl_scan.c
@@ -175,7 +175,9 @@ int zfs_no_scrub_io = B_FALSE; /* set to disable scrub i/o */
 int zfs_no_scrub_prefetch = B_FALSE; /* set to disable scrub prefetch */
 enum ddt_class zfs_scrub_ddt_class_max = DDT_CLASS_DUPLICATE;
 /* max number of blocks to free in a single TXG */
-unsigned long zfs_async_block_max_blocks = 100000;
+unsigned long zfs_async_block_max_blocks = ULONG_MAX;
+/* max number of dedup blocks to free in a single TXG */
+unsigned long zfs_max_async_dedup_frees = 100000;
 
 int zfs_resilver_disable_defer = 0; /* set to disable resilver deferring */
 
@@ -3101,6 +3103,11 @@ dsl_scan_async_block_should_pause(dsl_scan_t *scn)
 		return (B_TRUE);
 	}
 
+	if (zfs_max_async_dedup_frees != 0 &&
+	    scn->scn_dedup_frees_this_txg >= zfs_max_async_dedup_frees) {
+		return (B_TRUE);
+	}
+
 	elapsed_nanosecs = gethrtime() - scn->scn_sync_start_time;
 	return (elapsed_nanosecs / NANOSEC > zfs_txg_timeout ||
 	    (NSEC2MSEC(elapsed_nanosecs) > scn->scn_async_block_min_time_ms &&
@@ -3125,6 +3132,8 @@ dsl_scan_free_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
 	    -bp_get_dsize_sync(scn->scn_dp->dp_spa, bp),
 	    -BP_GET_PSIZE(bp), -BP_GET_UCSIZE(bp), tx);
 	scn->scn_visited_this_txg++;
+	if (BP_GET_DEDUP(bp))
+		scn->scn_dedup_frees_this_txg++;
 	return (0);
 }
 
@@ -3365,6 +3374,7 @@ dsl_process_async_destroys(dsl_pool_t *dp, dmu_tx_t *tx)
 		    NSEC2MSEC(gethrtime() - scn->scn_sync_start_time),
 		    (longlong_t)tx->tx_txg, err);
 		scn->scn_visited_this_txg = 0;
+		scn->scn_dedup_frees_this_txg = 0;
 
 		/*
 		 * Write out changes to the DDT that may be required as a
@@ -3493,6 +3503,7 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
 
 	/* reset scan statistics */
 	scn->scn_visited_this_txg = 0;
+	scn->scn_dedup_frees_this_txg = 0;
 	scn->scn_holes_this_txg = 0;
 	scn->scn_lt_min_this_txg = 0;
 	scn->scn_gt_max_this_txg = 0;
@@ -4327,6 +4338,9 @@ ZFS_MODULE_PARAM(zfs, zfs_, no_scrub_prefetch, INT, ZMOD_RW,
 ZFS_MODULE_PARAM(zfs, zfs_, async_block_max_blocks, ULONG, ZMOD_RW,
 	"Max number of blocks freed in one txg");
 
+ZFS_MODULE_PARAM(zfs, zfs_, max_async_dedup_frees, ULONG, ZMOD_RW,
+	"Max number of dedup blocks freed in one txg");
+
 ZFS_MODULE_PARAM(zfs, zfs_, free_bpobj_enabled, INT, ZMOD_RW,
 	"Enable processing of the free_bpobj");