--- a/mojoshader_internal.h	Mon Jun 23 14:56:00 2014 -0400
+++ b/mojoshader_internal.h	Thu Oct 02 15:54:31 2014 -0400
@@ -68,6 +68,11 @@
 #error glsl120 profile requires glsl profile. Fix your build.
 #endif
 
+// Microsoft's preprocessor has some quirks. In some ways, it doesn't work
+//  like you'd expect a C preprocessor to function.
+#ifndef MATCH_MICROSOFT_PREPROCESSOR
+#define MATCH_MICROSOFT_PREPROCESSOR 1
+#endif
 
 // Other stuff you can disable...