diff --git a/m4/ChangeLog b/m4/ChangeLog
index 740c25ee9..faa611b52 100644
--- a/m4/ChangeLog
+++ b/m4/ChangeLog
@@ -3,8 +3,6 @@
 	* c-bs-a.m4: Use `changequote(<<,>>)', rather than `changequote(, )'
 	because the latter didn't work.
 
-	* prereq.m4: Use new AC_C_PROTOTYPES instead of AM_C_PROTOTYPES.
-
 2000-01-15  Jim Meyering  <meyering@lucent.com>
 
 	* jm-macros.m4 (AC_REPLACE_FUNCS): Add gethostname and getusershell.