diff --git a/ChangeLog b/ChangeLog
index 7d4a3317ca..ffe35d5d1d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2024-04-16  Sam James  <sam@gentoo.org>
+
+	wchar: Fix serial number.
+	* m4/wchar_h.m4: Remove duplicate serial number specification and
+	increment serial.
+
 2024-04-16  Collin Funk  <collin.funk1@gmail.com>
 
 	gnulib-tool.py: Make GLModule's __eq__ and __hash__ method agree.
diff --git a/m4/wchar_h.m4 b/m4/wchar_h.m4
index a7b660defd..995bdc659d 100644
--- a/m4/wchar_h.m4
+++ b/m4/wchar_h.m4
@@ -1,5 +1,5 @@
 # wchar_h.m4
-# serial 1
+# serial 64
 dnl Copyright (C) 2007-2024 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -9,8 +9,6 @@ dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
 
 dnl Written by Eric Blake.
 
-# wchar_h.m4 serial 63
-
 AC_DEFUN_ONCE([gl_WCHAR_H],
 [
   AC_REQUIRE([gl_WCHAR_H_DEFAULTS])