diff --git a/sdk_container/src/third_party/coreos-overlay/eclass/cros-kernel/x86_64_defconfig b/sdk_container/src/third_party/coreos-overlay/eclass/cros-kernel/x86_64_defconfig
index 48686fefeb..d20c88ce9c 100644
--- a/sdk_container/src/third_party/coreos-overlay/eclass/cros-kernel/x86_64_defconfig
+++ b/sdk_container/src/third_party/coreos-overlay/eclass/cros-kernel/x86_64_defconfig
@@ -481,7 +481,9 @@ CONFIG_HOTPLUG_CPU=y
 # CONFIG_BOOTPARAM_HOTPLUG_CPU0 is not set
 # CONFIG_DEBUG_HOTPLUG_CPU0 is not set
 # CONFIG_COMPAT_VDSO is not set
-# CONFIG_CMDLINE_BOOL is not set
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="root=gptprio:"
+# CONFIG_CMDLINE_OVERRIDE is not set
 CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
 CONFIG_USE_PERCPU_NUMA_NODE_ID=y