diff --git a/src/os/src/windows/wSysinfo.c b/src/os/src/windows/wSysinfo.c
index 193a83d7d73ee904204fa6ce1a5a1b562c92d17a..46a75e9a00aea994c44b64d0d3e2bd854643ae1d 100644
--- a/src/os/src/windows/wSysinfo.c
+++ b/src/os/src/windows/wSysinfo.c
@@ -120,7 +120,7 @@ static void taosGetSystemLocale() {
 
   SGlobalCfg *cfg_charset = taosGetConfigOption("charset");
   if (cfg_charset && cfg_charset->cfgStatus < TAOS_CFG_CSTATUS_DEFAULT) {
-    strcpy(tsCharset, "cp936");
+    strcpy(tsCharset, "UTF-8");
     cfg_charset->cfgStatus = TAOS_CFG_CSTATUS_DEFAULT;
     uInfo("charset not configured, set to default:%s", tsCharset);
   }