diff --git a/include/wx/taskbarbutton.h b/include/wx/taskbarbutton.h
index b6b404efe0..5848e7c8d3 100644
--- a/include/wx/taskbarbutton.h
+++ b/include/wx/taskbarbutton.h
@@ -15,15 +15,15 @@
 
 #include "wx/defs.h"
 
-// ----------------------------------------------------------------------------
-// wxTaskBarButton: define wxTaskBarButton interface.
-// ----------------------------------------------------------------------------
-
 class WXDLLIMPEXP_FWD_CORE wxTaskBarButton;
 class WXDLLIMPEXP_FWD_CORE wxTaskBarJumpListCategory;
 class WXDLLIMPEXP_FWD_CORE wxTaskBarJumpList;
 class WXDLLIMPEXP_FWD_CORE wxTaskBarJumpListImpl;
 
+// ----------------------------------------------------------------------------
+// wxTaskBarButton: define wxTaskBarButton interface.
+// ----------------------------------------------------------------------------
+
 /**
     State of the task bar button.
 */
diff --git a/src/msw/taskbarbutton.cpp b/src/msw/taskbarbutton.cpp
index b23db8d09f..ebc5918daa 100644
--- a/src/msw/taskbarbutton.cpp
+++ b/src/msw/taskbarbutton.cpp
@@ -1428,7 +1428,7 @@ void wxTaskBarJumpListImpl::LoadKnownCategory(const wxString& title)
     hr = docList->GetList
                  (
                      title == "Recent" ? ADLT_RECENT : ADLT_FREQUENT,
-                     NULL,
+                     0,
                      wxIID_IObjectArray,
                      reinterpret_cast<void **>(&array)
                  );