--- xproto-7.0.24/config.guess.orig	2013-06-15 15:28:50.269926300 +0000
+++ xproto-7.0.24/config.guess	2013-06-15 15:30:52.725976200 +0000
@@ -841,6 +844,9 @@
     amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
 	echo x86_64-unknown-cygwin
 	exit ;;
+    amd64:MSYS*:*:* | x86_64:MSYS*:*:*)
+	echo x86_64-unknown-msys
+	exit ;;
     p*:CYGWIN*:*)
 	echo powerpcle-unknown-cygwin
 	exit ;;