diff --git a/beast/utility/static_initializer.h b/beast/utility/static_initializer.h
index 245b6c78f..2033dd39c 100644
--- a/beast/utility/static_initializer.h
+++ b/beast/utility/static_initializer.h
@@ -122,14 +122,14 @@ static_initializer <T, Tag>::static_initializer (Args&&... args)
         for(;;)
         {
             long prev;
-            prev = InterlockedCompareExchange(&_.state, 1, 0);
+            prev = _InterlockedCompareExchange(&_.state, 1, 0);
             if (prev == 0)
             {
                 try
                 {
                     ::new(t) T (std::forward<Args>(args)...);                   
                     static destroyer on_exit (t);
-                    InterlockedIncrement(&_.state);
+                    _InterlockedIncrement(&_.state);
                 }
                 catch(...)
                 {