diff --git a/arch/powerpc/cpu/mpc5xx/Kconfig b/arch/powerpc/cpu/mpc5xx/Kconfig
index aad4a7c..5275447 100644
--- a/arch/powerpc/cpu/mpc5xx/Kconfig
+++ b/arch/powerpc/cpu/mpc5xx/Kconfig
@@ -6,6 +6,7 @@
 
 choice
 	prompt "Target select"
+	optional
 
 config TARGET_CMI_MPC5XX
 	bool "Support cmi_mpc5xx"