diff --git a/simulators/ethereum/consensus/main.go b/simulators/ethereum/consensus/main.go
index 317938341c..6f11c8798d 100644
--- a/simulators/ethereum/consensus/main.go
+++ b/simulators/ethereum/consensus/main.go
@@ -254,15 +254,16 @@ var ruleset = map[string]envvars{
 	"Merge": {
 		"HIVE_FORK_HOMESTEAD": 0,
 		//"HIVE_FORK_DAO_BLOCK":      2000,
-		"HIVE_FORK_TANGERINE":      0,
-		"HIVE_FORK_SPURIOUS":       0,
-		"HIVE_FORK_BYZANTIUM":      0,
-		"HIVE_FORK_CONSTANTINOPLE": 0,
-		"HIVE_FORK_PETERSBURG":     0,
-		"HIVE_FORK_ISTANBUL":       0,
-		"HIVE_FORK_BERLIN":         0,
-		"HIVE_FORK_LONDON":         0,
-		"HIVE_FORK_MERGE":          0,
+		"HIVE_FORK_TANGERINE":            0,
+		"HIVE_FORK_SPURIOUS":             0,
+		"HIVE_FORK_BYZANTIUM":            0,
+		"HIVE_FORK_CONSTANTINOPLE":       0,
+		"HIVE_FORK_PETERSBURG":           0,
+		"HIVE_FORK_ISTANBUL":             0,
+		"HIVE_FORK_BERLIN":               0,
+		"HIVE_FORK_LONDON":               0,
+		"HIVE_FORK_MERGE":                0,
+		"HIVE_TERMINAL_TOTAL_DIFFICULTY": 0,
 	},
 }