diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
index fd92d7348f32..ad98b933055e 100644
--- a/arch/csky/Kconfig
+++ b/arch/csky/Kconfig
@@ -279,7 +279,7 @@ config NR_CPUS
 	int "Maximum number of CPUs (2-32)"
 	range 2 32
 	depends on SMP
-	default "2"
+	default "4"
 
 config HIGHMEM
 	bool "High Memory Support"