diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index b16407c..d82caff 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -598,6 +598,7 @@
 	int "Maximum number of CPUs (2-32)"
 	range 2 32
 	depends on SMP
+	default "4" if CPU_SHX3
 	default "2"
 	help
 	  This allows you to specify the maximum number of CPUs which this