diff --git a/conf/machine/include/rk3066.inc b/conf/machine/include/rk3066.inc
index bdc9ede..d43a88c 100644
--- a/conf/machine/include/rk3066.inc
+++ b/conf/machine/include/rk3066.inc
@@ -19,5 +19,5 @@ KERNEL_IMAGETYPE = "zImage"
 IMAGE_FSTYPES += "ext4"
 
 SERIAL_CONSOLES ?= "115200;ttyFIQ0"
-KERNEL_DEFCONFIG = "multi_v7_defconfig"
+KBUILD_DEFCONFIG = "multi_v7_defconfig"
 
diff --git a/conf/machine/include/rk3288.inc b/conf/machine/include/rk3288.inc
index 088fad0..e6c19a2 100644
--- a/conf/machine/include/rk3288.inc
+++ b/conf/machine/include/rk3288.inc
@@ -7,4 +7,4 @@ DEFAULTTUNE="cortexa17-neon"
 PREFERRED_PROVIDER_virtual/kernel = "linux"
 SERIAL_CONSOLES = "115200;ttyS2"
 KERNEL_IMAGETYPE = "zImage"
-KERNEL_DEFCONFIG = "multi_v7_defconfig"
+KBUILD_DEFCONFIG = "multi_v7_defconfig"