diff --git a/params/config.go b/params/config.go
index f976544414..5e8ba024bf 100644
--- a/params/config.go
+++ b/params/config.go
@@ -148,7 +148,7 @@ var (
 		ChurritoBlock: big.NewInt(0),
 		DonutBlock:    big.NewInt(0),
 		EspressoBlock: big.NewInt(0),
-		GForkBlock:    nil,
+		GForkBlock:    big.NewInt(0),
 
 		Istanbul: &IstanbulConfig{
 			Epoch:          30000,