diff --git a/interface/wx/fs_mem.h b/interface/wx/fs_mem.h
index a083bbc0c6..546ced5b2b 100644
--- a/interface/wx/fs_mem.h
+++ b/interface/wx/fs_mem.h
@@ -90,6 +90,9 @@ public:
     */
     static void AddFile(const wxString& filename, wxImage& image, wxBitmapType type);
     static void AddFile(const wxString& filename, const wxBitmap& bitmap, wxBitmapType type);
+    static void AddFile(const wxString& filename, const wxString& textdata);
+    static void AddFile(const wxString& filename, const void *binarydata, size_t size);
+
     //@}
 
     //@{
diff --git a/interface/wx/html/htmlcell.h b/interface/wx/html/htmlcell.h
index 9abac27be7..085f4afd4c 100644
--- a/interface/wx/html/htmlcell.h
+++ b/interface/wx/html/htmlcell.h
@@ -435,6 +435,13 @@ public:
         Sets the cell's position within parent container.
     */
     virtual void SetPos(int x, int y);
+
+    /**
+       Converts the cell into text representation. If sel != NULL then
+       only part of the cell inside the selection is converted.
+    */
+    virtual wxString ConvertToText(wxHtmlSelection* sel) const;
+
 };