diff -Nru M2VRequantiser/main.c M2VRequantiser-amd64/main.c
--- M2VRequantiser/main.c	2006-03-03 01:08:30.000000000 +0100
+++ M2VRequantiser-amd64/main.c	2009-01-28 08:40:26.000000000 +0100
@@ -15,7 +15,7 @@
 
 #if defined(__ppc__) || defined(__ppc64__)
 	#define USE_GLOBAL_REGISTER // assign registers to bit buffers
-#elif defined(__i386__)
+#elif defined(__i386__) || defined(__amd64__)
 	// #define USE_GLOBAL_REGISTER // assign registers to bit buffers
 #else
 	#error "Unknown Architecture"