diff --git a/include/wx/preferences.h b/include/wx/preferences.h
index 472ea8f57b..935c7b1875 100644
--- a/include/wx/preferences.h
+++ b/include/wx/preferences.h
@@ -98,7 +98,7 @@ public:
     // Show the preferences dialog or bring it to the top if it's already
     // shown. Notice that this method may or may not block depending on the
     // platform, i.e. depending on whether the dialog is modal or not.
-    void Show(wxWindow* parent);
+    virtual void Show(wxWindow* parent);
 
     // Hide the currently shown dialog, if any. This doesn't do anything on the
     // platforms using modal preferences dialogs but should be called to
diff --git a/interface/wx/preferences.h b/interface/wx/preferences.h
index 3688fa3e06..656ce907c1 100644
--- a/interface/wx/preferences.h
+++ b/interface/wx/preferences.h
@@ -77,7 +77,7 @@ public:
         @param parent The window that invokes the preferences.
                       Call Dismiss() before it's destroyed.
      */
-    void Show(wxWindow* parent);
+    virtual void Show(wxWindow* parent);
 
     /**
         Hide the currently shown dialog, if any.