diff --git a/Documentation/filesystems/ext3.txt b/Documentation/filesystems/ext3.txt
index 9840d5b..22e4040 100644
--- a/Documentation/filesystems/ext3.txt
+++ b/Documentation/filesystems/ext3.txt
@@ -22,6 +22,11 @@
 			the inode which will represent the ext3 file
 			system's journal file.
 
+journal_dev=devnum	When the external journal device's major/minor numbers
+			have changed, this option allows to specify the new
+			journal location. The journal device is identified
+			through its new major/minor numbers encoded in devnum.
+
 noload			Don't load the journal on mounting.
 
 data=journal		All data are committed into the journal prior