diff --git a/include/linux/magic.h b/include/linux/magic.h
index 22036dd..156c40f 100644
--- a/include/linux/magic.h
+++ b/include/linux/magic.h
@@ -8,6 +8,7 @@
 #define EFS_SUPER_MAGIC		0x414A53
 #define EXT2_SUPER_MAGIC	0xEF53
 #define EXT3_SUPER_MAGIC	0xEF53
+#define EXT4_SUPER_MAGIC	0xEF53
 #define HPFS_SUPER_MAGIC	0xf995e849
 #define ISOFS_SUPER_MAGIC	0x9660
 #define JFFS2_SUPER_MAGIC	0x72b6