diff --git a/ossUpgrade.sh b/ossUpgrade.sh
index d48bc54..7876022 100755
--- a/ossUpgrade.sh
+++ b/ossUpgrade.sh
@@ -38,7 +38,7 @@ function compare(){
   if [ "${upstreamOssInfoMd5}" = "${locOssInfoMd5}" ];then
     return 0
   else 
-    if [ "${upstreamOssInfoMd5}" = "d41d8cd98f00b204e9800998ecf8427e" || "${locOssInfoMd5}" != "d41d8cd98f00b204e9800998ecf8427e" ];then
+    if [ "${upstreamOssInfoMd5}" = "d41d8cd98f00b204e9800998ecf8427e" ] || [ "${locOssInfoMd5}" != "d41d8cd98f00b204e9800998ecf8427e" ];then
       echo "maybe a mistake, ignore upgrade"
       return 0
     else