diff --git a/ChangeLog b/ChangeLog
index 6e689df..abc6743 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2025-05-31  Bruno Haible  <bruno@clisp.org>
+
+	Mark automake 1.18 as supported.
+	* autogen.sh: Update comment.
+
 2025-04-26  Bruno Haible  <bruno@clisp.org>
 
 	Fix -Wshadow=compatible-local warnings.
diff --git a/autogen.sh b/autogen.sh
index a335f61..75c07a9 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -4,7 +4,7 @@
 # also regenerates all config.h.in, configure files with new versions of
 # autoconf.
 #
-# This script requires autoconf-2.64..2.72 and automake-1.16.4..1.17 in the PATH.
+# This script requires autoconf-2.64..2.72 and automake-1.16.4..1.18 in the PATH.
 
 # Copyright (C) 2003-2025 Free Software Foundation, Inc.
 #