diff --git a/arch/arm/mach-kirkwood/Kconfig b/arch/arm/mach-kirkwood/Kconfig
index 45c6687..1261885 100644
--- a/arch/arm/mach-kirkwood/Kconfig
+++ b/arch/arm/mach-kirkwood/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Marvell Kirkwood board select"
+	optional
 
 config TARGET_OPENRD
 	bool "Marvell OpenRD Board"