@@ -1381,7 +1381,7 @@ func (srv *Server) ImagePull(job *engine.Job) engine.Status {

 	}

 	job.GetenvJson("authConfig", authConfig)

-	job.GetenvJson("metaHeaders", metaHeaders)

+	job.GetenvJson("metaHeaders", &metaHeaders)

 	c, err := srv.poolAdd("pull", localName+":"+tag)

 	if err != nil {

@@ -1611,7 +1611,7 @@ func (srv *Server) ImagePush(job *engine.Job) engine.Status {

 	tag := job.Getenv("tag")

 	job.GetenvJson("authConfig", authConfig)

-	job.GetenvJson("metaHeaders", metaHeaders)

+	job.GetenvJson("metaHeaders", &metaHeaders)

 	if _, err := srv.poolAdd("push", localName); err != nil {

 		return job.Error(err)

 	}