diff --git a/freeglut/freeglut/src/mswin/freeglut_internal_mswin.h b/freeglut/freeglut/src/mswin/freeglut_internal_mswin.h
index 26a8551..8cb3769 100644
--- a/freeglut/freeglut/src/mswin/freeglut_internal_mswin.h
+++ b/freeglut/freeglut/src/mswin/freeglut_internal_mswin.h
@@ -48,7 +48,9 @@
 #endif
 
 
+#ifndef HAVE_VFPRINTF
 #define  HAVE_VFPRINTF 1
+#endif
 
 /* MinGW may lack a prototype for ChangeDisplaySettingsEx() (depending on the version?) */
 #if !defined(ChangeDisplaySettingsEx)
@@ -140,4 +142,4 @@ struct tagSFG_PlatformJoystick
 extern void (__cdecl *__glutExitFunc)( int return_value );
 
 
-#endif  /* FREEGLUT_INTERNAL_MSWIN_H */
\ No newline at end of file
+#endif  /* FREEGLUT_INTERNAL_MSWIN_H */