diff --git a/import-layers/yocto-poky/meta/conf/machine/include/tune-ppce500mc.inc b/import-layers/yocto-poky/meta/conf/machine/include/tune-ppce500mc.inc
index a1ca9be..bc26a0f 100644
--- a/import-layers/yocto-poky/meta/conf/machine/include/tune-ppce500mc.inc
+++ b/import-layers/yocto-poky/meta/conf/machine/include/tune-ppce500mc.inc
@@ -12,3 +12,6 @@
 
 # glibc configure options to get e500mc specific library (for sqrt)
 GLIBC_EXTRA_OECONF += "${@bb.utils.contains('TUNE_FEATURES', 'ppce500mc', '-with-cpu=e500mc', '', d)}"
+
+# pass -mcpu=e500mc for ppce500mc kernel cross compile
+TARGET_CC_KERNEL_ARCH = "-mcpu=e500mc"