diff --git a/chain/stmgr/execute.go b/chain/stmgr/execute.go
index de7ca2894..3191a45db 100644
--- a/chain/stmgr/execute.go
+++ b/chain/stmgr/execute.go
@@ -3,13 +3,13 @@ package stmgr
 import (
 	"context"
 	"fmt"
+	"sync/atomic"
 
 	"github.com/ipfs/go-cid"
 	cbg "github.com/whyrusleeping/cbor-gen"
 	"go.opencensus.io/stats"
 	"go.opencensus.io/trace"
 	"golang.org/x/xerrors"
-	"sync/atomic"
 
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"