diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index e0a77af5c130..42138882667d 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -139,6 +139,11 @@ config GENERIC_HWEIGHT
 config FIX_EARLYCON_MEM
 	def_bool y
 
+config ILLEGAL_POINTER_VALUE
+	hex
+	default 0 if 32BIT
+	default 0xdead000000000000 if 64BIT
+
 config PGTABLE_LEVELS
 	int
 	default 3 if 64BIT