diff --git a/ChangeLog b/ChangeLog
index b19bc4c5f..ee877a323 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2004-08-22  Pavel S. Shirshov  <pavelsh@mail.ru>
+
+	* syntax/m4.syntax: Add matching AS_* keywords.
+	From Leonard den Ottolander <leonard *den.ottolander.nl>
+
 2004-08-22  Pavel S. Shirshov  <pavelsh@mail.ru>
 
 	* m4/ri-gcc-warnings.m4: Typo fixes.
diff --git a/syntax/m4.syntax b/syntax/m4.syntax
index 9c9555f64..46768d3e8 100644
--- a/syntax/m4.syntax
+++ b/syntax/m4.syntax
@@ -58,6 +58,7 @@ context default
 	#=========================
 	# Autoconf and Automake macros
 	keyword whole AC_\[ABCDEFGHIJKLMNOPQRSTUVWXYZ_\] cyan
+	keyword whole AS_\[ABCDEFGHIJKLMNOPQRSTUVWXYZ_\] cyan
 	keyword whole AM_\[ABCDEFGHIJKLMNOPQRSTUVWXYZ_\] cyan
 
 	#=========================