diff --git a/lib/ChangeLog b/lib/ChangeLog
index 4e8c68ccf..eb603befe 100644
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,6 +1,7 @@
 2000-07-29  Jim Meyering  <meyering@lucent.com>
 
 	* dirname.c (dir_name) [MSDOS]: Declare `lim' to be const.
+	(dir_name): Assert that there are no trailing slashes.
 
 2000-07-18  Bruno Haible  <haible@clisp.cons.org>