diff --git a/drivers/md/md.c b/drivers/md/md.c
index 3387f940140b..5ed57688e5c5 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5634,6 +5634,9 @@ static int get_array_info(struct mddev *mddev, void __user *arg)
 		info.state = (1<<MD_SB_CLEAN);
 	if (mddev->bitmap && mddev->bitmap_info.offset)
 		info.state |= (1<<MD_SB_BITMAP_PRESENT);
+	if (mddev_is_clustered(mddev))
+		info.state |= (1<<MD_SB_CLUSTERED);
+
 	info.active_disks  = insync;
 	info.working_disks = working;
 	info.failed_disks  = failed;
diff --git a/include/uapi/linux/raid/md_p.h b/include/uapi/linux/raid/md_p.h
index 49f4210d4394..643489d33e68 100644
--- a/include/uapi/linux/raid/md_p.h
+++ b/include/uapi/linux/raid/md_p.h
@@ -101,6 +101,7 @@ typedef struct mdp_device_descriptor_s {
 #define MD_SB_CLEAN		0
 #define MD_SB_ERRORS		1
 
+#define	MD_SB_CLUSTERED		5 /* MD is clustered */
 #define	MD_SB_BITMAP_PRESENT	8 /* bitmap may be present nearby */
 
 /*