diff --git a/meta-witherspoon/conf/machine/rainier.conf b/meta-witherspoon/conf/machine/rainier.conf
index 628a45a..78ffbbc 100644
--- a/meta-witherspoon/conf/machine/rainier.conf
+++ b/meta-witherspoon/conf/machine/rainier.conf
@@ -1,6 +1,8 @@
 KERNEL_DEVICETREE = "aspeed-bmc-ibm-rainier.dtb"
 UBOOT_MACHINE = "evb-ast2600_defconfig"
 
+OBMC_POWER_SUPPLY_INSTANCES = "0 1 2 3"
+
 require conf/machine/include/ast2600.inc
 require conf/machine/include/obmc-bsp-common.inc
 require conf/machine/include/openpower.inc