diff --git a/kv/iter.go b/kv/iter.go
index 226565b778..9ae6c6a7a5 100644
--- a/kv/iter.go
+++ b/kv/iter.go
@@ -31,6 +31,9 @@ var (
 	ErrLockConflict = errors.New("Error: Lock conflict")
 	// ErrLazyConditionPairsNotMatch is used when value in store differs from expect pairs.
 	ErrLazyConditionPairsNotMatch = errors.New("Error: Lazy condition pairs not match")
+	// ErrRetryable is used when KV store occurs RPC error or some other
+	// errors which SQL layer can safely retry.
+	ErrRetryable = errors.New("Error: KV error safe to retry")
 )
 
 var (
diff --git a/kv/txn.go b/kv/txn.go
index 3a0a972522..4e83a5b08a 100644
--- a/kv/txn.go
+++ b/kv/txn.go
@@ -25,7 +25,9 @@ func IsRetryableError(err error) bool {
 		return false
 	}
 
-	if terror.ErrorEqual(err, ErrLockConflict) || terror.ErrorEqual(err, ErrConditionNotMatch) {
+	if terror.ErrorEqual(err, ErrRetryable) ||
+		terror.ErrorEqual(err, ErrLockConflict) ||
+		terror.ErrorEqual(err, ErrConditionNotMatch) {
 		return true
 	}