diff --git a/libcontainer/selinux/selinux.go b/libcontainer/selinux/selinux.go
index 4babee1be..255080c64 100644
--- a/libcontainer/selinux/selinux.go
+++ b/libcontainer/selinux/selinux.go
@@ -13,6 +13,7 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
+	"sync"
 	"syscall"
 
 	"github.com/docker/docker/pkg/mount"