--- plugin_ssim.c	2007/07/26 14:30:31	1.9
+++ plugin_ssim.c	2008/11/26 01:04:34	1.10
@@ -478,7 +478,7 @@
 
 	ssim->grid = param->acc;
 
-#if defined(ARCH_IS_IA32)
+#if defined(ARCH_IS_IA32) || defined(ARCH_IS_X86_64)
 	{
 		int cpu_flags = check_cpu_features();
 		if((cpu_flags & XVID_CPU_MMX) && (param->acc > 0)){