Index: Makefile
--- Makefile.orig	2013-01-23 20:48:16.000000000 +0100
+++ Makefile	2013-02-07 19:53:14.432152160 +0100
@@ -124,8 +124,12 @@
   ifeq ($(shell uname -m),x86_64)
     CFLAGS  += -fPIC -DPSTM_64BIT -DPSTM_X86_64
   else
+  ifeq ($(shell uname -m),amd64)
+    CFLAGS  += -fPIC -DPSTM_64BIT -DPSTM_X86_64
+  else
     CFLAGS  += -DPSTM_X86
   endif
+  endif
 endif
 
 #