diff --git a/include/wx/univ/theme.h b/include/wx/univ/theme.h
index f141b2645b..0c571dd95b 100644
--- a/include/wx/univ/theme.h
+++ b/include/wx/univ/theme.h
@@ -69,7 +69,7 @@ private:
 
     // the current theme
     static wxTheme *ms_theme;
-    friend class wxThemeInfo;
+    friend struct WXDLLEXPORT wxThemeInfo;
 };
 
 // ----------------------------------------------------------------------------