diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 1250f0e..74f17a9 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2079,7 +2079,7 @@
 		disk = conf->mirrors + i;
 
 		if (!disk->rdev ||
-		    !test_bit(In_sync, &rdev->flags)) {
+		    !test_bit(In_sync, &disk->rdev->flags)) {
 			disk->head_position = 0;
 			mddev->degraded++;
 		}