diff --git a/include/wx/private/localeset.h b/include/wx/private/localeset.h
index 769af1a1ab..b51bebcd0d 100644
--- a/include/wx/private/localeset.h
+++ b/include/wx/private/localeset.h
@@ -51,7 +51,7 @@ private:
 // under the other platforms currently).
 inline void wxEnsureLocaleIsCompatibleWithCRT()
 {
-#if defined(__WXOSX__)
+#if defined(__DARWIN__)
     // In OS X and iOS, wchar_t CRT functions convert to char* and fail under
     // some locales. The safest fix is to set LC_CTYPE to UTF-8 to ensure that
     // they can handle any input.
@@ -61,7 +61,7 @@ inline void wxEnsureLocaleIsCompatibleWithCRT()
     //
     // See https://stackoverflow.com/questions/11713745/why-does-the-printf-family-of-functions-care-about-locale
     setlocale(LC_CTYPE, "UTF-8");
-#endif // defined(__WXOSX__)
+#endif // defined(__DARWIN__)
 }
 
 #endif // _WX_PRIVATE_LOCALESET_H_