diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/files/amd64_defconfig-4.2 b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/files/amd64_defconfig-4.2
index 4e3ef98ede..5a48ea705b 100644
--- a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/files/amd64_defconfig-4.2
+++ b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/files/amd64_defconfig-4.2
@@ -135,6 +135,7 @@ CONFIG_HOTPLUG_PCI=y
 CONFIG_HOTPLUG_PCI_ACPI=y
 CONFIG_HOTPLUG_PCI_ACPI_IBM=m
 CONFIG_IA32_EMULATION=y
+CONFIG_PPP=m
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_PACKET_DIAG=m
diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/files/arm64_defconfig-4.2 b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/files/arm64_defconfig-4.2
index 448565d9b3..853590048b 100644
--- a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/files/arm64_defconfig-4.2
+++ b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/files/arm64_defconfig-4.2
@@ -60,6 +60,7 @@ CONFIG_SECCOMP=y
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_COMPAT=y
 CONFIG_CPU_IDLE=y
+CONFIG_PPP=m
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y