diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index faf72108aa..98782f74aa 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -720,13 +720,13 @@ int taos_init() {
 int taos_options_imp(TSDB_OPTION option, const char *str) {
   if (option == TSDB_OPTION_CONFIGDIR) {
 #ifndef WINDOWS
+    char newstr[PATH_MAX];
     int  len = strlen(str);
     if (len > 1 && str[0] != '"' && str[0] != '\'') {
         if (len + 2 >= PATH_MAX) {
         tscError("Too long path %s", str);
         return -1;
       }
-      char newstr[PATH_MAX];
       newstr[0] = '"';
       strncpy(newstr+1, str, len);
       newstr[len + 1] = '"';