diff --git a/include/wx/private/fontmgr.h b/include/wx/private/fontmgr.h
index d886739ae6..f01604dd1e 100644
--- a/include/wx/private/fontmgr.h
+++ b/include/wx/private/fontmgr.h
@@ -201,7 +201,7 @@ protected:
 
 
 /// wxFontMgrFontRefData implementation using wxFontsManager classes
-struct wxFontMgrFontRefData : public wxObjectRefData
+class wxFontMgrFontRefData : public wxObjectRefData
 {
 public:
     wxFontMgrFontRefData(int size = wxDEFAULT,