diff --git a/zh-cn/application-dev/database/database-mdds-guidelines.md b/zh-cn/application-dev/database/database-mdds-guidelines.md
index 4414dbbe7134d2483a48b3f55d768e9d788d1646..6558bc98420f88eb0696e9c1cfb0413959ab1d6b 100644
--- a/zh-cn/application-dev/database/database-mdds-guidelines.md
+++ b/zh-cn/application-dev/database/database-mdds-guidelines.md
@@ -75,7 +75,7 @@
            backup : false,
            autoSync : false,
            kvStoreType : distributedData.KVStoreType.SINGLE_VERSION,
-           securityLevel : distributedData.SecurityLevel.S0,
+           securityLevel : distributedData.SecurityLevel.S0
        };
        kvManager.getKVStore('storeId', options, function (err, store) {
            if (err) {