diff --git a/doc/developer-guidelines.sgml b/doc/developer-guidelines.sgml
index b332c277..ddc72ef9 100644
--- a/doc/developer-guidelines.sgml
+++ b/doc/developer-guidelines.sgml
@@ -57,6 +57,7 @@
 	gnu make 3.79
 	automake 1.9.2
 	autoconf 2.58
+	gnu m4 1.4.2
 	</literallayout>
 
 	To compile from CVS, after you have checked out the code, run: