diff --git a/build/boards/cv181x/cv1812cp_milkv_duo256m_sd/linux/cvitek_cv1812cp_milkv_duo256m_sd_defconfig b/build/boards/cv181x/cv1812cp_milkv_duo256m_sd/linux/cvitek_cv1812cp_milkv_duo256m_sd_defconfig
index 5445875e8..43ed58c24 100644
--- a/build/boards/cv181x/cv1812cp_milkv_duo256m_sd/linux/cvitek_cv1812cp_milkv_duo256m_sd_defconfig
+++ b/build/boards/cv181x/cv1812cp_milkv_duo256m_sd/linux/cvitek_cv1812cp_milkv_duo256m_sd_defconfig
@@ -213,6 +213,7 @@ CONFIG_ION_CARVEOUT_HEAP=y
 CONFIG_ION_CMA_HEAP=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_CV1835_SYSDMA_REMAP=y
+CONFIG_CVI_MAILBOX=y
 CONFIG_PWM=y
 CONFIG_SIFIVE_PLIC=y
 CONFIG_ANDROID=y