diff --git a/docker/docker_linux.go b/docker/docker_linux.go
index c38a795..fd6df6d 100644
--- a/docker/docker_linux.go
+++ b/docker/docker_linux.go
@@ -4,6 +4,7 @@ package docker
 
 import (
 	"encoding/json"
+        "os"
 	"os/exec"
 	"path"
 	"strconv"