diff --git a/grub-core/disk/mdraid1x_linux.c b/grub-core/disk/mdraid1x_linux.c
index 7cc80d3df..c980feba4 100644
--- a/grub-core/disk/mdraid1x_linux.c
+++ b/grub-core/disk/mdraid1x_linux.c
@@ -178,7 +178,7 @@ grub_mdraid_detect (grub_disk_t disk,
 	return NULL;
 
       if (grub_disk_read (disk, sector, 
-			  (char *) &sb.dev_roles[grub_le_to_cpu32 (sb.dev_number)]
+			  (char *) (sb.dev_roles + grub_le_to_cpu32 (sb.dev_number))
 			  - (char *) &sb,
 			  sizeof (role), &role))
 	return NULL;