diff --git a/interfaces/kits/js/src/mod_environment/environment_core.h b/interfaces/kits/js/src/mod_environment/environment_core.h
index 0962c1f4ab1b3c2e576d44d67071e87613951dba..613e0f300dd17fc6455d8ea12e3798d91c2b51e2 100644
--- a/interfaces/kits/js/src/mod_environment/environment_core.h
+++ b/interfaces/kits/js/src/mod_environment/environment_core.h
@@ -22,14 +22,15 @@
 namespace OHOS {
 namespace FileManagement {
 namespace ModuleEnvironment {
+using namespace std;
 using namespace ModuleFileIO;
-FsResult<std::string> DoGetStorageDataDir();
-FsResult<std::string> DoGetUserDataDir();
-FsResult<std::string> DoGetUserDownloadDir();
-FsResult<std::string> DoGetUserDesktopDir();
-FsResult<std::string> DoGetUserDocumentDir();
-FsResult<std::string> DoGetExternalStorageDir();
-FsResult<std::string> DoGetUserHomeDir();
+FsResult<string> DoGetStorageDataDir();
+FsResult<string> DoGetUserDataDir();
+FsResult<string> DoGetUserDownloadDir();
+FsResult<string> DoGetUserDesktopDir();
+FsResult<string> DoGetUserDocumentDir();
+FsResult<string> DoGetExternalStorageDir();
+FsResult<string> DoGetUserHomeDir();
 } // namespace ModuleEnvironment
 } // namespace FileManagement
 } // namespace OHOS