diff --git a/Documentation/filesystems/00-INDEX b/Documentation/filesystems/00-INDEX
index 3c384c0..4dc28cc 100644
--- a/Documentation/filesystems/00-INDEX
+++ b/Documentation/filesystems/00-INDEX
@@ -34,6 +34,8 @@
 	- info, mount options and specifications for the Ext2 filesystem.
 ext3.txt
 	- info, mount options and specifications for the Ext3 filesystem.
+ext4.txt
+	- info, mount options and specifications for the Ext4 filesystem.
 files.txt
 	- info on file management in the Linux kernel.
 fuse.txt