diff --git a/ChangeLog b/ChangeLog
index ac85a3630..778c546a2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2001-06-01  Peter Stephenson  <pws@csr.com>
+
+	* 14660: Etc/zsh-development-guide: can't use autoconf 2.50 yet.
+
 2001-06-01  Oliver Kiddle  <opk@zsh.org>
 
 	* 14658: Base/Utility/_arguments, Base/Utility/_values: correctly
diff --git a/Etc/zsh-development-guide b/Etc/zsh-development-guide
index 6917621b2..8cbb62d55 100644
--- a/Etc/zsh-development-guide
+++ b/Etc/zsh-development-guide
@@ -23,6 +23,10 @@ tools:
   of the config.status files that get generated.  See the comments in
   configure.in and at the end of Src/mkmakemod.sh for an explanation.)
 
+  Note that configure.in has not yet been modified to work with autoconf
+  2.50.  Use version 2.13 until configure.in and associated files have
+  been updated.
+
 * GNU m4.  (Required by autoconf.)
 
 * yodl.