diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig
index 74ba5acc12a4..ed605b5e3162 100644
--- a/arch/riscv/configs/defconfig
+++ b/arch/riscv/configs/defconfig
@@ -33,6 +33,7 @@ CONFIG_SOC_STARFIVE=y
 CONFIG_ARCH_SUNXI=y
 CONFIG_ARCH_TENSTORRENT=y
 CONFIG_ARCH_THEAD=y
+CONFIG_ARCH_ULTRARISC=y
 CONFIG_ARCH_VIRT=y
 CONFIG_ARCH_CANAAN=y
 CONFIG_SMP=y