diff --git a/build/params_2k.go b/build/params_2k.go
index bcce509d7..11267db6f 100644
--- a/build/params_2k.go
+++ b/build/params_2k.go
@@ -3,9 +3,6 @@
 package build
 
 import (
-	"math"
-	"os"
-
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/lotus/chain/actors/policy"
 )
@@ -18,8 +15,8 @@ const UpgradeIgnitionHeight = -2
 const UpgradeRefuelHeight = -3
 const UpgradeTapeHeight = -4
 
-var UpgradeActorsV2Height = abi.ChainEpoch(10)
-var UpgradeLiftoffHeight = abi.ChainEpoch(-5)
+const UpgradeActorsV2Height = 10
+const UpgradeLiftoffHeight = -5
 
 const UpgradeKumquatHeight = 15
 const UpgradeCalicoHeight = 20
@@ -36,11 +33,6 @@ func init() {
 	policy.SetConsensusMinerMinPower(abi.NewStoragePower(2048))
 	policy.SetMinVerifiedDealSize(abi.NewStoragePower(256))
 
-	if os.Getenv("LOTUS_DISABLE_V2_ACTOR_MIGRATION") == "1" {
-		UpgradeActorsV2Height = math.MaxInt64
-		UpgradeLiftoffHeight = 11
-	}
-
 	BuildType |= Build2k
 }
 
diff --git a/build/params_mainnet.go b/build/params_mainnet.go
index 195f0dd01..5f23b9b1e 100644
--- a/build/params_mainnet.go
+++ b/build/params_mainnet.go
@@ -5,7 +5,6 @@
 package build
 
 import (
-	"math"
 	"os"
 
 	"github.com/filecoin-project/go-address"
@@ -27,7 +26,7 @@ const UpgradeSmokeHeight = 51000
 const UpgradeIgnitionHeight = 94000
 const UpgradeRefuelHeight = 130800
 
-var UpgradeActorsV2Height = abi.ChainEpoch(138720)
+const UpgradeActorsV2Height = 138720
 
 const UpgradeTapeHeight = 140760
 
@@ -53,10 +52,6 @@ func init() {
 		SetAddressNetwork(address.Mainnet)
 	}
 
-	if os.Getenv("LOTUS_DISABLE_V2_ACTOR_MIGRATION") == "1" {
-		UpgradeActorsV2Height = math.MaxInt64
-	}
-
 	Devnet = false
 }
 
diff --git a/cmd/tvx/codenames_test.go b/cmd/tvx/codenames_test.go
index 00d107707..bef2e982f 100644
--- a/cmd/tvx/codenames_test.go
+++ b/cmd/tvx/codenames_test.go
@@ -18,7 +18,7 @@ func TestProtocolCodenames(t *testing.T) {
 		t.Fatal("expected breeze codename")
 	}
 
-	if height := build.UpgradeActorsV2Height + 1; GetProtocolCodename(height) != "actorsv2" {
+	if height := build.UpgradeActorsV2Height + 1; GetProtocolCodename(abi.ChainEpoch(height)) != "actorsv2" {
 		t.Fatal("expected actorsv2 codename")
 	}