diff --git a/include/wx/richtext/richtextbuffer.h b/include/wx/richtext/richtextbuffer.h
index dbfda5f288..5b26abca85 100644
--- a/include/wx/richtext/richtextbuffer.h
+++ b/include/wx/richtext/richtextbuffer.h
@@ -5760,6 +5760,9 @@ public:
 
     virtual wxString GetPropertiesMenuLabel() const { return wxGetTranslation("&Cell"); }
 
+    /// Don't allow a cell to be deleted in Defragment
+    virtual bool IsEmpty() const { return false; }
+
 // Accessors
 
     /**