diff --git a/src/os/windows/win32.h b/src/os/windows/win32.h
--- a/src/os/windows/win32.h
+++ b/src/os/windows/win32.h
@@ -19,10 +19,6 @@ bool LoadLibraryList(Function proc[], co
 char *convert_from_fs(const wchar_t *name, char *utf8_buf, size_t buflen);
 wchar_t *convert_to_fs(const char *name, wchar_t *utf16_buf, size_t buflen);
 
-#if defined(__MINGW32__) && !defined(__MINGW64__)
-#define SHGFP_TYPE_CURRENT 0
-#endif /* __MINGW32__ */
-
 void Win32SetCurrentLocaleName(const char *iso_code);
 int OTTDStringCompare(const char *s1, const char *s2);