--- arm.h	Thu Jan  2 20:10:32 2014
+++ arm2.h	Wed Feb 12 13:26:26 2014
@@ -31,7 +31,7 @@
 
 #define BOOST_ARCH_ARM BOOST_VERSION_NUMBER_NOT_AVAILABLE
 
-#if defined(__arm__) || defined(__thumb__) || \
+#if defined(__arm__) || defined(_M_ARM) || defined(__thumb__) || \
     defined(__TARGET_ARCH_ARM) || defined(__TARGET_ARCH_THUMB)
 #   undef BOOST_ARCH_ARM
 #   if !defined(BOOST_ARCH_ARM) && defined(__TARGET_ARCH_ARM)