diff --git a/include/wx/dataobj.h b/include/wx/dataobj.h
index 4b52ffac17..348ad20286 100644
--- a/include/wx/dataobj.h
+++ b/include/wx/dataobj.h
@@ -549,7 +549,7 @@ private:
     // wxURLDataObject defined in msw/ole/dataobj2.h
 #elif defined(__WXGTK20__)
     #include "wx/gtk/dataobj2.h"
-    // wxURLDataObject defined in msw/ole/dataobj2.h
+    // wxURLDataObject defined in gtk/dataobj2.h
 
 #else
     #if defined(__WXGTK__)
diff --git a/interface/wx/dataobj.h b/interface/wx/dataobj.h
index 2647306b31..b6afd34daf 100644
--- a/interface/wx/dataobj.h
+++ b/interface/wx/dataobj.h
@@ -630,15 +630,17 @@ public:
     wxTheClipboard->SetData(new wxURLDataObject(url));
     @endcode
 
-    @note This class is derived from wxDataObjectComposite on Windows rather
-          than wxTextDataObject on all other platforms.
+    @note The actual base class of this class is not always wxDataObject
+        itself, but rather either wxDataObjectComposite in wxMSW and wxGTK or
+        wxTextDataObject in the other ports. Please don't rely on the exact
+        base class, it is not guaranteed that it won't change in the future.
 
     @library{wxcore}
     @category{dnd}
 
     @see @ref overview_dnd, wxDataObject
 */
-class wxURLDataObject: public wxTextDataObject
+class wxURLDataObject: public wxDataObject
 {
 public:
     /**