#else /* !KERNEL_PRIVATE -- System Framework header */
#if defined (__ppc__) || defined(__ppc64__)
#include <System/ppc/cpu_capabilities.h>
-#elif defined (__i386__)
+#elif defined (__i386__) || defined(__x86_64__)
#include <System/i386/cpu_capabilities.h>
#else
#error architecture not supported