diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 56b5051..5f2f4c4 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -109,7 +109,7 @@
 };
 
 #define GENHD_FL_REMOVABLE			1
-#define GENHD_FL_DRIVERFS			2
+/* 2 is unused */
 #define GENHD_FL_MEDIA_CHANGE_NOTIFY		4
 #define GENHD_FL_CD				8
 #define GENHD_FL_UP				16