diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index 34a54e5310a11..d36a5f39f13a6 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -79,7 +79,8 @@ config SOC_CANAAN_K210_DTB_BUILTIN
 	  If unsure, say Y.
 
 config ARCH_CANAAN_K210_DTB_SOURCE
-	def_bool SOC_CANAAN_K210_DTB_SOURCE
+	string
+	default SOC_CANAAN_K210_DTB_SOURCE
 
 config SOC_CANAAN_K210_DTB_SOURCE
 	string "Source file for the Canaan Kendryte K210 builtin DTB"