diff --git a/conf/machine/include/rockchip.inc b/conf/machine/include/rockchip.inc
index 83cbc89..de6d1e5 100644
--- a/conf/machine/include/rockchip.inc
+++ b/conf/machine/include/rockchip.inc
@@ -13,6 +13,7 @@ XSERVER = "xserver-xorg \
 
 PREFERRED_PROVIDER_virtual/kernel = "linux-rockchip-3.0"
 
+KERNEL_IMAGETYPE = "Image"
 IMAGE_CLASSES += "rockchip-update-img"
 IMAGE_FSTYPES += "ext3 tar.gz rockchip-update-img"