diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 7c76b4d..b81e0d9 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -32,6 +32,7 @@
 config ARCH_RV64I
 	bool "RV64I"
 	select 64BIT
+	select PHYS_64BIT
 	help
 	  Choose this option to target the RV64I base integer instruction set.