diff --git a/ChangeLog b/ChangeLog
index 31b8f93..d0df6c1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2024-04-04  Bruno Haible  <bruno@clisp.org>
+
+	Fix macro file 'serial' numbers for 'aclocal --install'.
+	* gnulib-local/m4/alloca.m4: Make 'serial' effective. Set value to 100,
+	in order to override gnulib's alloca.m4.
+
 2023-12-30  Bruno Haible  <bruno@clisp.org>
 
 	Switch to autoconf 2.72.
diff --git a/gnulib-local/m4/alloca.m4 b/gnulib-local/m4/alloca.m4
index a0900ca..58a4458 100644
--- a/gnulib-local/m4/alloca.m4
+++ b/gnulib-local/m4/alloca.m4
@@ -1,5 +1,6 @@
-# alloca.m4 serial 5
-dnl Copyright (C) 2002-2003, 2006, 2011, 2021-2022 Free Software Foundation, Inc.
+# alloca.m4
+# serial 100
+dnl Copyright (C) 2002-2024 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.