diff --git a/dri/download/download.go b/dri/download/download.go
index ede6a81..c64a112 100644
--- a/dri/download/download.go
+++ b/dri/download/download.go
@@ -32,7 +32,7 @@ func Down(url, path, name string, e ...*Error) bool {
 
 	pix, err := ioutil.ReadAll(resp.Body)
 	_, err = io.Copy(out, bytes.NewReader(pix))
-	if err != nil && e[0] != nil {
+	if err != nil && len(e) != 0 {
 		e[0].SetError(err)
 		return false
 	}