diff --git a/pkg/controller/pod.go b/pkg/controller/pod.go
index 4d073216a..a8308e86e 100644
--- a/pkg/controller/pod.go
+++ b/pkg/controller/pod.go
@@ -1,6 +1,8 @@
 package controller
 
 import (
+	"sync"
+
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/watch"