diff --git a/arch/arm64/configs/rk1808_linux_defconfig b/arch/arm64/configs/rk1808_linux_defconfig
index 3bb0d7fc07fa..89ee3eb3073c 100644
--- a/arch/arm64/configs/rk1808_linux_defconfig
+++ b/arch/arm64/configs/rk1808_linux_defconfig
@@ -222,7 +222,7 @@ CONFIG_FIQ_DEBUGGER_TRUST_ZONE=y
 CONFIG_RK_CONSOLE_THREAD=y
 # CONFIG_COMMON_CLK_XGENE is not set
 # CONFIG_ARM_ARCH_TIMER_EVTSTREAM is not set
-# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_ROCKCHIP_IOMMU=y
 # CONFIG_CPU_PX30 is not set
 # CONFIG_CPU_RK3308 is not set
 # CONFIG_CPU_RK3328 is not set