diff --git a/pkg/cri/server/container_execsync.go b/pkg/cri/server/container_execsync.go
index b39c46c..8bb5b8f 100644
--- a/pkg/cri/server/container_execsync.go
+++ b/pkg/cri/server/container_execsync.go
@@ -19,6 +19,7 @@ package server
 import (
 	"bytes"
 	"io"
+    "errors"
 	"syscall"
 	"time"