diff --git a/po/zh_CN.po b/po/zh_CN.po
index 4351dfef0..759477eee 100644
--- a/po/zh_CN.po
+++ b/po/zh_CN.po
@@ -973,7 +973,7 @@ msgstr "删除追踪数据"
 
 #: js/messages.php:36
 msgid "Dropping Primary Key/Index"
-msgstr ""
+msgstr "正在删除主键"
 
 #: js/messages.php:37
 msgid "This operation could take a long time. Proceed anyway?"