--- Libc/Libc-391/include/machine/limits.h
+++ Libc/Libc-391.5.18/include/machine/limits.h
@@ -4,7 +4,7 @@
    This file is public domain.  */
 #if defined (__ppc__) || defined (__ppc64__)
 #include <ppc/limits.h>
-#elif defined (__i386__)
+#elif defined (__i386__) || defined(__x86_64__)
 #include <i386/limits.h>
 #else
 #error architecture not supported