diff --git a/ACE/tests/Singleton_Restart_Test.cpp b/ACE/tests/Singleton_Restart_Test.cpp
index f18966df0300a..7d5e8a2324505 100644
--- a/ACE/tests/Singleton_Restart_Test.cpp
+++ b/ACE/tests/Singleton_Restart_Test.cpp
@@ -26,7 +26,11 @@ void report_error (const ACE_TCHAR *lock)
 using Singleton1 = ACE_Singleton<int, ACE_MT_SYNCH::MUTEX>;
 using Singleton2 = ACE_Singleton<int, ACE_MT_SYNCH::RECURSIVE_MUTEX>;
 
+# if defined (ACE_WIN32) && defined (ACE_USES_WCHAR)
+int wmain ()
+#else
 int main ()
+#endif
 {
   ACE::init ();
   ACE_START_TEST (ACE_TEXT ("Singleton_Restart_Test"));