diff --git a/samples/taskbar/tbtest.cpp b/samples/taskbar/tbtest.cpp
index 7b6a80b834..a8f90c9ed5 100644
--- a/samples/taskbar/tbtest.cpp
+++ b/samples/taskbar/tbtest.cpp
@@ -143,7 +143,11 @@ wxMenu *MyTaskBarIcon::CreatePopupMenu()
     return menu;
 }
 
+#if WXWIN_COMPATIBILITY_2_4
+void MyTaskBarIcon::OnLButtonDClick(wxEvent&)
+#else
 void MyTaskBarIcon::OnLButtonDClick(wxTaskBarIconEvent&)
+#endif
 {
     dialog->Show(true);
 }
diff --git a/samples/taskbar/tbtest.h b/samples/taskbar/tbtest.h
index b4862386b6..c67914d998 100644
--- a/samples/taskbar/tbtest.h
+++ b/samples/taskbar/tbtest.h
@@ -14,7 +14,11 @@ class MyTaskBarIcon: public wxTaskBarIcon
 public:
     MyTaskBarIcon() {};
 
+#if WXWIN_COMPATIBILITY_2_4
+    void OnLButtonDClick(wxEvent&);
+#else
     void OnLButtonDClick(wxTaskBarIconEvent&);
+#endif
     void OnMenuRestore(wxCommandEvent&);
     void OnMenuExit(wxCommandEvent&);
     void OnMenuSetNewIcon(wxCommandEvent&);