diff --git a/core/state/statedb.go b/core/state/statedb.go
index c26d70978e..038bc7899f 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -18,6 +18,7 @@
 package state
 
 import (
+	"errors"
 	"fmt"
 	"runtime"
 	"sort"
diff --git a/core/state_transition.go b/core/state_transition.go
index 63d7fb3ded..39ba57196d 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -17,6 +17,7 @@
 package core
 
 import (
+	"errors"
 	"fmt"
 	"math"
 	"math/big"