diff --git a/include/os/osLocale.h b/include/os/osLocale.h
index d7a3540887..78d5f948b0 100644
--- a/include/os/osLocale.h
+++ b/include/os/osLocale.h
@@ -28,9 +28,9 @@ extern "C" {
 #define setlocale SETLOCALE_FUNC_TAOS_FORBID
 #endif
 
-char *taosCharsetReplace(char *charsetstr);
-void  taosGetSystemLocale(char *outLocale, char *outCharset);
-int32_t  taosSetSystemLocale(const char *inLocale);
+char   *taosCharsetReplace(char *charsetstr);
+void    taosGetSystemLocale(char *outLocale, char *outCharset);
+int32_t taosSetSystemLocale(const char *inLocale);
 
 #ifdef __cplusplus
 }
diff --git a/source/os/src/osLocale.c b/source/os/src/osLocale.c
index cb0a2646fd..484436fafe 100644
--- a/source/os/src/osLocale.c
+++ b/source/os/src/osLocale.c
@@ -87,8 +87,7 @@ int32_t taosSetSystemLocale(const char *inLocale) {
     return terrno;
   }
 
-  (void)memcpy(tsLocale, inLocale, strlen(inLocale) + 1);
-
+  tstrncpy(tsLocale, locale, TD_LOCALE_LEN);
   return 0;
 }
 
diff --git a/source/os/test/osEnvTests.cpp b/source/os/test/osEnvTests.cpp
index d5b3cac8a6..6af6f84b68 100644
--- a/source/os/test/osEnvTests.cpp
+++ b/source/os/test/osEnvTests.cpp
@@ -84,9 +84,8 @@ TEST(osEnvTests, osSufficient) {
   ret = osTempSpaceSufficient();
   EXPECT_EQ(ret, true);
 
-  osSetSystemLocale(NULL, NULL);
-  osSetSystemLocale(NULL, NULL);
-  osSetSystemLocale("1", "2");
+  taosSetSystemLocale(NULL);
+  taosSetSystemLocale("1");
 
   osSetProcPath(1, NULL);
   osSetProcPath(0, (char **)&ret);