diff --git a/core/vm/runtime/runtime.go b/core/vm/runtime/runtime.go
index edbf541766..ef5929985c 100644
--- a/core/vm/runtime/runtime.go
+++ b/core/vm/runtime/runtime.go
@@ -53,7 +53,7 @@ type Config struct {
 func setDefaults(cfg *Config) {
 	if cfg.ChainConfig == nil {
 		cfg.ChainConfig = &params.ChainConfig{
-			ChainId:        big.NewInt(1),
+			ChainId:        big.NewInt(101),
 			HomesteadBlock: new(big.Int),
 			DAOForkBlock:   new(big.Int),
 			DAOForkSupport: false,