diff --git a/routers/repo/download.go b/routers/repo/download.go
index 3329073e0c0..9e7c1d047bb 100644
--- a/routers/repo/download.go
+++ b/routers/repo/download.go
@@ -25,7 +25,7 @@ func ServeData(ctx *context.Context, name string, reader io.Reader) error {
 	if !isTextFile {
 		_, isImageFile := base.IsImageFile(buf)
 		if !isImageFile {
-			ctx.Resp.Header().Set("Content-Disposition", "attachment; filename="+path.Base(ctx.Repo.TreeName))
+			ctx.Resp.Header().Set("Content-Disposition", "attachment; filename=\""+path.Base(ctx.Repo.TreeName)+"\"")
 			ctx.Resp.Header().Set("Content-Transfer-Encoding", "binary")
 		}
 	} else {