diff --git a/meta-ibm/meta-witherspoon/conf/machine/witherspoon-tacoma.conf b/meta-ibm/meta-witherspoon/conf/machine/witherspoon-tacoma.conf
index e8a3830..2184847 100644
--- a/meta-ibm/meta-witherspoon/conf/machine/witherspoon-tacoma.conf
+++ b/meta-ibm/meta-witherspoon/conf/machine/witherspoon-tacoma.conf
@@ -1,6 +1,8 @@
 KERNEL_DEVICETREE = "aspeed-bmc-opp-tacoma.dtb"
 UBOOT_MACHINE = "evb-ast2600_defconfig"
 
+OBMC_POWER_SUPPLY_INSTANCES = "0 1"
+
 MACHINEOVERRIDES =. "ibm-ac-server:witherspoon:"
 require conf/machine/include/ast2600.inc
 require conf/machine/include/obmc-bsp-common.inc