diff --git a/test/device.cfg b/test/device.cfg
index 6af209859..b9b6fcdba 100644
--- a/test/device.cfg
+++ b/test/device.cfg
@@ -124,7 +124,7 @@ arch_flags = {
     ],
     'x86': [
         '-m32',
-        '-march=i686',
+        '-march=prescott',
         '-msse2',
         '-msse3',
     ],