Change the callback declarations to a safer format.
diff --git a/include/winbase.h b/include/winbase.h
index 80cb6a4..d673d95 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -23,7 +23,7 @@
typedef DWORD CALLBACK (*LPTHREAD_START_ROUTINE)(LPVOID);
-typedef VOID (WINAPI *PFIBER_START_ROUTINE)( LPVOID lpFiberParameter );
+typedef VOID WINAPI (*PFIBER_START_ROUTINE)( LPVOID lpFiberParameter );
typedef PFIBER_START_ROUTINE LPFIBER_START_ROUTINE;
typedef RTL_CRITICAL_SECTION CRITICAL_SECTION;