diff --git a/meta-ibm/conf/machine/witherspoon.conf b/meta-ibm/conf/machine/witherspoon.conf
index 9b8e3f1..5a7c4cb 100644
--- a/meta-ibm/conf/machine/witherspoon.conf
+++ b/meta-ibm/conf/machine/witherspoon.conf
@@ -1,5 +1,5 @@
 KMACHINE = "aspeed"
-KERNEL_DEVICETREE = "${KMACHINE}-bmc-opp-${MACHINE}.dtb"
+KERNEL_DEVICETREE = "aspeed/${KMACHINE}-bmc-opp-${MACHINE}.dtb"
 
 PREFERRED_PROVIDER_virtual/bootloader = "u-boot-aspeed"
 PREFERRED_PROVIDER_u-boot = "u-boot-aspeed"