diff --git a/params/config.go b/params/config.go
index b47c0deba4..9b3b92484a 100644
--- a/params/config.go
+++ b/params/config.go
@@ -270,7 +270,7 @@ var (
 		CancunTime:              nil,
 		PragueTime:              nil,
 		VerkleTime:              nil,
-		TerminalTotalDifficulty: nil,
+		TerminalTotalDifficulty: big.NewInt(math.MaxInt64),
 		Ethash:                  new(EthashConfig),
 		Clique:                  nil,
 	}