diff --git a/cmd/kubeadm/app/api/types.go b/cmd/kubeadm/app/api/types.go
index 59999a11950..1c1717f9d94 100644
--- a/cmd/kubeadm/app/api/types.go
+++ b/cmd/kubeadm/app/api/types.go
@@ -68,7 +68,7 @@ type InitFlags struct {
 
 const (
 	DefaultServiceDNSDomain   = "cluster.local"
-	DefaultServicesCIDRString = "100.64.0.0/12" // Carrier-grade NAT range (RFC 6598)
+	DefaultServicesCIDRString = "10.12.0.0/12"
 	DefaultKubernetesVersion  = "v1.4.0"
 )