diff --git a/conf/machine/include/nanopi-m4.inc b/conf/machine/include/nanopi-m4.inc
index 74cdae8..603160f 100644
--- a/conf/machine/include/nanopi-m4.inc
+++ b/conf/machine/include/nanopi-m4.inc
@@ -3,6 +3,7 @@
 
 require rk3399.inc
 
+KMACHINE = "nanopi-m4"
 KERNEL_DEVICETREE = "rockchip/rk3399-nanopi-m4.dtb"
 
 RK_BOOT_DEVICE = "mmcblk1"