diff --git a/src/generic/treectlg.cpp b/src/generic/treectlg.cpp
index 3ee328dff5..99d64a87f3 100644
--- a/src/generic/treectlg.cpp
+++ b/src/generic/treectlg.cpp
@@ -2866,7 +2866,7 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
     {
         // Ask the tree control what tooltip (if any) should be shown
         wxTreeEvent hevent(wxEVT_COMMAND_TREE_ITEM_GETTOOLTIP, GetId());
-        hevent.m_item = (long) hoverItem;
+        hevent.m_item = hoverItem;
         hevent.SetEventObject(this);
 
         if ( GetEventHandler()->ProcessEvent(hevent) && hevent.IsAllowed() )
diff --git a/src/msw/treectrl.cpp b/src/msw/treectrl.cpp
index a7c06e728e..862196ca69 100644
--- a/src/msw/treectrl.cpp
+++ b/src/msw/treectrl.cpp
@@ -2480,7 +2480,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                 NMTVGETINFOTIP *info = (NMTVGETINFOTIP*)lParam;
 
                 // Which item are we trying to get a tooltip for?
-                event.m_item = (WXHTREEITEM) info->hItem;
+                event.m_item = info->hItem;
 
                 break;
             }