diff --git a/core/state/trc21_reader.go b/core/state/trc21_reader.go
index 6e0e363617..af5fd25b13 100644
--- a/core/state/trc21_reader.go
+++ b/core/state/trc21_reader.go
@@ -5,6 +5,8 @@ import (
 	"math/big"
 
 	"github.com/XinFinOrg/XDPoSChain/common"
+	lru "github.com/hashicorp/golang-lru"
+
 )
 
 var (