diff --git a/chain/stmgr/stmgr.go b/chain/stmgr/stmgr.go
index 09b8284dd..b76dd0faf 100644
--- a/chain/stmgr/stmgr.go
+++ b/chain/stmgr/stmgr.go
@@ -354,3 +354,7 @@ func (sm *StateManager) GetNtwkVersion(ctx context.Context, height abi.ChainEpoc
 	}
 	return sm.latestVersion
 }
+
+func (sm *StateManager) VMSys() vm.SyscallBuilder {
+	return sm.syscalls
+}
diff --git a/cmd/lotus-sim/simulation/blockbuilder/blockbuilder.go b/cmd/lotus-sim/simulation/blockbuilder/blockbuilder.go
index 2ffc0bf14..36b9cee75 100644
--- a/cmd/lotus-sim/simulation/blockbuilder/blockbuilder.go
+++ b/cmd/lotus-sim/simulation/blockbuilder/blockbuilder.go
@@ -83,7 +83,7 @@ func NewBlockBuilder(ctx context.Context, logger *zap.SugaredLogger, sm *stmgr.S
 		Epoch:          parentTs.Height() + 1,
 		Rand:           r,
 		Bstore:         sm.ChainStore().StateBlockstore(),
-		Syscalls:       sm.ChainStore().VMSys(),
+		Syscalls:       sm.VMSys(),
 		CircSupplyCalc: sm.GetVMCirculatingSupply,
 		NtwkVersion:    sm.GetNtwkVersion,
 		BaseFee:        abi.NewTokenAmount(0),
diff --git a/cmd/lotus-sim/simulation/simulation.go b/cmd/lotus-sim/simulation/simulation.go
index d91d30eda..83b45f942 100644
--- a/cmd/lotus-sim/simulation/simulation.go
+++ b/cmd/lotus-sim/simulation/simulation.go
@@ -18,6 +18,8 @@ import (
 
 	"github.com/filecoin-project/lotus/chain/stmgr"
 	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/filecoin-project/lotus/chain/vm"
+	"github.com/filecoin-project/lotus/cmd/lotus-sim/simulation/mock"
 	"github.com/filecoin-project/lotus/cmd/lotus-sim/simulation/stages"
 )
 
@@ -198,7 +200,7 @@ func (sim *Simulation) SetUpgradeHeight(nv network.Version, epoch abi.ChainEpoch
 	if err != nil {
 		return err
 	}
-	sm, err := stmgr.NewStateManagerWithUpgradeSchedule(sim.Node.Chainstore, newUpgradeSchedule)
+	sm, err := stmgr.NewStateManagerWithUpgradeSchedule(sim.Node.Chainstore, vm.Syscalls(mock.Verifier), newUpgradeSchedule)
 	if err != nil {
 		return err
 	}