diff --git a/lustre/ChangeLog b/lustre/ChangeLog
index 9764ee853106ab5a01975cdde21d41ee0b3736a3..e3094c021163d4ec536f74aabeac4ab73a1b5f62 100644
--- a/lustre/ChangeLog
+++ b/lustre/ChangeLog
@@ -415,7 +415,10 @@ Details    : Add "-u" option for lustre_config script to support upgrading 1.4
 
 Severity   : normal
 Bugzilla   : 13570
-Description: grant fixes to avoid grant_space > avail_space
+Description: To avoid grant space > avaible space when the disk is almost
+             full. Without this patch you might see the error "grant XXXX >
+             available" or some LBUG about grant, when the disk is almost 
+             full.
 Details    : In filter_check_grant, for non_grant cache write, we should
              check the left space by  if (*left > ungranted + bytes), instead
              of (*left > ungranted), because only we are sure the left space