diff --git a/openpower/configs/openpower_mambo_defconfig b/openpower/configs/openpower_mambo_defconfig
index c9f9dbe..e76432c 100644
--- a/openpower/configs/openpower_mambo_defconfig
+++ b/openpower/configs/openpower_mambo_defconfig
@@ -11,7 +11,7 @@
 BR2_TARGET_GENERIC_GETTY_PORT="hvc0"
 BR2_GENERATE_LOCALE="en_US.UTF-8"
 BR2_ROOTFS_OVERLAY="../openpower/overlay"
-BR2_ROOTFS_POST_BUILD_SCRIPT="../openpower/scripts/fixup-target-var"
+BR2_ROOTFS_POST_BUILD_SCRIPT="../openpower/scripts/fixup-target-var ../openpower/scripts/firmware-whitelist"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.4.27"