--- memprof-0.5.1/stack-frame.c	2002-08-19 20:24:48.000000000 +0200
+++ stack-frame.c	2005-06-19 16:46:20.000000000 +0200
@@ -69,7 +69,7 @@
 
 #define HAVE_FRAME_ACCESSORS
 
-#if defined (__GNUC__) && defined (__i386__)
+#if defined (__GNUC__) && (defined (__i386__) || defined (__amd64__))
 typedef struct stack_frame_struct stack_frame;
 struct stack_frame_struct {
     stack_frame *next;