diff --git a/doc/ChangeLog b/doc/ChangeLog
index dc6852cb6..3b1b43153 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,8 @@
+2004-05-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* coreutils.texi (sort invocation): Document that "sort -m -o F"
+	might write F before reading all the input.
+
 2004-05-09  Jim Meyering  <jim@meyering.net>
 
 	* coreutils.texi (stat invocation): Change IO to I/O.