diff --git a/src/client/src/tscParseOpenTSDB.c b/src/client/src/tscParseOpenTSDB.c
index 6735462f17013ed4813345964be62e318cdefe2f..a2a3f149ce2e13c3382bc5b0317859dc7457c734 100644
--- a/src/client/src/tscParseOpenTSDB.c
+++ b/src/client/src/tscParseOpenTSDB.c
@@ -759,14 +759,14 @@ int32_t parseValueFromJSON(cJSON *root, TAOS_SML_KV *pVal, SSmlLinesInfo* info)
     }
     case cJSON_String: {
       /* set default JSON type to binary/nchar according to
-       * user configured parameter tsSmlDefaultJSONStrType
+       * user configured parameter tsDefaultJSONStrType
        */
-      if (strcasecmp(tsSmlDefaultJSONStrType, "binary") == 0) {
+      if (strcasecmp(tsDefaultJSONStrType, "binary") == 0) {
         pVal->type = TSDB_DATA_TYPE_BINARY;
-      } else if (strcasecmp(tsSmlDefaultJSONStrType, "nchar") == 0) {
+      } else if (strcasecmp(tsDefaultJSONStrType, "nchar") == 0) {
         pVal->type = TSDB_DATA_TYPE_NCHAR;
       } else {
-        tscError("OTD:0x%"PRIx64" Invalid default JSON string type set from config %s", info->id, tsSmlDefaultJSONStrType);
+        tscError("OTD:0x%"PRIx64" Invalid default JSON string type set from config %s", info->id, tsDefaultJSONStrType);
         return TSDB_CODE_TSC_INVALID_JSON_CONFIG;
       }
       //pVal->length = wcslen((wchar_t *)root->valuestring) * TSDB_NCHAR_SIZE;
diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index e8d0937705f049bf3c1d4237eff4023a335ef611..beeb4e8b243e21e33f4162b07ec218c40e4029f9 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -228,7 +228,7 @@ extern char Compressor[];
 extern int8_t tsDeadLockKillQuery;
 
 // schemaless
-extern char tsSmlDefaultJSONStrType[];
+extern char tsDefaultJSONStrType[];
 
 typedef struct {
   char dir[TSDB_FILENAME_LEN];
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index 57a177b173e2b785064cb62668b7275c816e81fa..7d352a9dc1f0a9a97c7c1920f898fb286a01497f 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -282,8 +282,8 @@ char     Compressor[32] = "ZSTD_COMPRESSOR"; // ZSTD_COMPRESSOR or GZIP_COMPRESS
 // long query death-lock
 int8_t tsDeadLockKillQuery = 0;
 
-// schemaless
-char tsSmlDefaultJSONStrType[7] = "binary";
+// default JSON string type
+char tsDefaultJSONStrType[7] = "binary";
 
 int32_t (*monStartSystemFp)() = NULL;
 void (*monStopSystemFp)() = NULL;
@@ -1640,14 +1640,14 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
-  // Schemaless config
-  cfg.option = "smlDefaultJSONStrType";
-  cfg.ptr = tsSmlDefaultJSONStrType;
+  // default JSON string type option "binary"/"nchar"
+  cfg.option = "defaultJSONStrType";
+  cfg.ptr = tsDefaultJSONStrType;
   cfg.valType = TAOS_CFG_VTYPE_STRING;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW | TSDB_CFG_CTYPE_B_CLIENT;
   cfg.minValue = 0;
   cfg.maxValue = 0;
-  cfg.ptrLength = tListLen(tsSmlDefaultJSONStrType);
+  cfg.ptrLength = tListLen(tsDefaultJSONStrType);
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);