diff --git a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/files/arm64_defconfig-5.10 b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/files/arm64_defconfig-5.10
index 355c0c44e1..33b3aa6460 100644
--- a/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/files/arm64_defconfig-5.10
+++ b/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/files/arm64_defconfig-5.10
@@ -100,3 +100,4 @@ CONFIG_VIRTUALIZATION=y
 CONFIG_XGENE_DMA=y
 CONFIG_BCM7XXX_PHY=m
 CONFIG_BCMGENET=m
+CONFIG_MDIO_BCM_UNIMAC=m