diff --git a/include/linux/device.h b/include/linux/device.h
index a4a7b10..4410464 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -114,6 +114,8 @@
 #define BUS_NOTIFY_BOUND_DRIVER		0x00000003 /* driver bound to device */
 #define BUS_NOTIFY_UNBIND_DRIVER	0x00000004 /* driver about to be
 						      unbound */
+#define BUS_NOTIFY_UNBOUND_DRIVER	0x00000005 /* driver is unbound
+						      from the device */
 
 extern struct kset *bus_get_kset(struct bus_type *bus);
 extern struct klist *bus_get_device_klist(struct bus_type *bus);