diff --git a/Manage.c b/Manage.c
index ffe55f8..deeba2b 100644
--- a/Manage.c
+++ b/Manage.c
@@ -1289,8 +1289,6 @@ int Manage_subdevs(char *devname, int fd,
 	/* Do something to each dev.
 	 * devmode can be
 	 *  'a' - add the device
-	 *	   try HOT_ADD_DISK
-	 *         If that fails EINVAL, try ADD_NEW_DISK
 	 *  'S' - add the device as a spare - don't try re-add
 	 *  'j' - add the device as a journal device
 	 *  'A' - re-add the device
diff --git a/md_u.h b/md_u.h
index 2d66d52..b30893c 100644
--- a/md_u.h
+++ b/md_u.h
@@ -28,7 +28,6 @@
 #define ADD_NEW_DISK		_IOW (MD_MAJOR, 0x21, mdu_disk_info_t)
 #define HOT_REMOVE_DISK		_IO (MD_MAJOR, 0x22)
 #define SET_ARRAY_INFO		_IOW (MD_MAJOR, 0x23, mdu_array_info_t)
-#define HOT_ADD_DISK		_IO (MD_MAJOR, 0x28)
 #define SET_DISK_FAULTY		_IO (MD_MAJOR, 0x29)
 #define SET_BITMAP_FILE		_IOW (MD_MAJOR, 0x2b, int)