diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 4dd53fc..b3cfae4 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1888,7 +1888,8 @@
 
 		disk = conf->mirrors + i;
 
-		if (!disk->rdev) {
+		if (!disk->rdev ||
+		    !test_bit(In_sync, &disk->rdev->flags)) {
 			disk->head_position = 0;
 			mddev->degraded++;
 		}