diff --git a/meta-yocto-bsp/conf/machine/genericx86-64.conf b/meta-yocto-bsp/conf/machine/genericx86-64.conf
index 56e9bb6f10..a6154cdfae 100644
--- a/meta-yocto-bsp/conf/machine/genericx86-64.conf
+++ b/meta-yocto-bsp/conf/machine/genericx86-64.conf
@@ -3,5 +3,6 @@
 
 #@DESCRIPTION: Machine configuration for generic X86_64 (64-bit) PCs and servers. Supports a moderately wide range of drivers that should boot and be usable on "typical" hardware.
 
-include conf/machine/include/tune-x86_64.inc
+DEFAULTTUNE ?= "core2-64"
+include conf/machine/include/tune-core2.inc
 include conf/machine/include/genericx86-common.inc