diff --git a/business/jxstore/cms/sku.go b/business/jxstore/cms/sku.go
index eff6470d5..37c72bb49 100644
--- a/business/jxstore/cms/sku.go
+++ b/business/jxstore/cms/sku.go
@@ -525,7 +525,7 @@ func UpdateSkuName(ctx *jxcontext.Context, nameID int, payload map[string]interf
 		globals.SugarLogger.Debugf("UpdateSkuName valid:%s", utils.Format4Output(valid, false))
 		dao.Begin(db)
 		defer dao.Rollback(db)
-		if valid["img"] != "" {
+		if valid["img"] != nil {
 			imgContent, imgMD5, err2 := jxutils.DownloadFileByURL(valid["img"].(string))
 			if err = err2; err != nil {
 				return 0, err