diff --git a/module/bdev/raid/raid1.c b/module/bdev/raid/raid1.c
index 4617f414c..91236410b 100644
--- a/module/bdev/raid/raid1.c
+++ b/module/bdev/raid/raid1.c
@@ -317,7 +317,7 @@ raid1_get_io_channel(struct raid_bdev *raid_bdev)
 
 static struct raid_bdev_module g_raid1_module = {
 	.level = RAID1,
-	.base_bdevs_min = 2,
+	.base_bdevs_min = 1,
 	.base_bdevs_constraint = {CONSTRAINT_MIN_BASE_BDEVS_OPERATIONAL, 1},
 	.memory_domains_supported = true,
 	.start = raid1_start,