diff --git a/m4/ChangeLog b/m4/ChangeLog
index fe196cc4d..6dd5a6226 100644
--- a/m4/ChangeLog
+++ b/m4/ChangeLog
@@ -1,3 +1,8 @@
+2000-10-28  Jim Meyering  <meyering@lucent.com>
+
+	* prereq.m4 (jm_PREREQ): Add jm_PREREQ_MEMCHR.
+	(jm_PREREQ_MEMCHR): New function.
+
 2000-10-21  Jim Meyering  <meyering@lucent.com>
 
 	* check-decl.m4 (jm_CHECK_DECLS): Also check for memrchr.