diff --git a/src/msw/listbox.cpp b/src/msw/listbox.cpp
index e9f8db9e3a..f85cec4b55 100644
--- a/src/msw/listbox.cpp
+++ b/src/msw/listbox.cpp
@@ -798,7 +798,7 @@ bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
     if ( itemID == (UINT)-1 )
         return false;
 
-    long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
+    LRESULT data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
 
     wxCHECK( data && (data != LB_ERR), false );