diff --git a/make-includes/standard_suffixes.make b/make-includes/standard_suffixes.make
index bb87dcc..b34dbe7 100755
--- a/make-includes/standard_suffixes.make
+++ b/make-includes/standard_suffixes.make
@@ -1,6 +1,6 @@
 ################################################################################
 #
-# File: $Id$
+# $Id$
 #
 # Specify standard file suffix list.
 #
@@ -11,4 +11,4 @@
 #
 # Add standard file suffixes.
 #
-.SUFFIXES: .svg .pdf .tex .dvi .png .tif .plo .jpg .pict .eps .ps .R
+.SUFFIXES: .svg .pdf .tex .dvi .png .tif .plo .jpg .pict .eps .ps .R .xml