diff --git a/arch/amd64.sh b/arch/amd64.sh
index d8c08e4c..7ea9431f 100644
--- a/arch/amd64.sh
+++ b/arch/amd64.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
 ##arch/amd64.sh: Build definitions for amd64.
 ##@copyright GPL-2.0+
-CFLAGS_COMMON_ARCH='-march=x86-64 -mtune=core2 -msse -msse2 -msse3 '
+CFLAGS_COMMON_ARCH='-march=x86-64 -mtune=sandybridge -msse -msse2 -msse3 '