diff --git a/packaging/cfg/taos.cfg b/packaging/cfg/taos.cfg
index e42212ff0f55420dfa5f23638a69439be795e43a..5fd96a9b43275ed962a45218ae49749727dabd13 100644
--- a/packaging/cfg/taos.cfg
+++ b/packaging/cfg/taos.cfg
@@ -300,7 +300,7 @@ keepColumnName            1
 # tsdbMetaCompactRatio    0
 
 # default string type used for storing JSON String, options can be binary/nchar, default is binary
-# defaultJSONStrType      binary
+# defaultJSONStrType      nchar
 
 # force TCP transmission 
 # rpcForceTcp        0