1 files changed, 1 insertions, 0 deletions
diff --git a/md_u.h b/md_u.h
index be9868a7..76068d64 100644
--- a/md_u.h
+++ b/md_u.h
@@ -44,6 +44,7 @@
 #define STOP_ARRAY		_IO (MD_MAJOR, 0x32)
 #define STOP_ARRAY_RO		_IO (MD_MAJOR, 0x33)
 #define RESTART_ARRAY_RW	_IO (MD_MAJOR, 0x34)
+#define CLUSTERED_DISK_NACK	_IO (MD_MAJOR, 0x35)
 
 typedef struct mdu_version_s {
 	int major;