diff --git a/src/unix/taskbarx11.cpp b/src/unix/taskbarx11.cpp
index d1dfc5e746..385f05d46f 100644
--- a/src/unix/taskbarx11.cpp
+++ b/src/unix/taskbarx11.cpp
@@ -273,8 +273,8 @@ wxTaskBarIcon::~wxTaskBarIcon()
 {
     if (m_iconWnd)
     {
-        m_iconWnd->Disconnect(
-            wxEVT_DESTROY, wxObjectEventFunction(NULL), NULL, this);
+        m_iconWnd->Disconnect(wxEVT_DESTROY,
+            wxWindowDestroyEventHandler(wxTaskBarIcon::OnDestroy), NULL, this);
         RemoveIcon();
     }
 }