diff --git a/include/interfaces.h b/include/interfaces.h
index aba7cb7..733e3f3 100644
--- a/include/interfaces.h
+++ b/include/interfaces.h
@@ -305,6 +305,10 @@ public:
                              QString baudrate,
                              QString comPort) const = 0;
         // download binary file down into device controller
+
+    virtual bool dc_updatePrinterTemplate(enum FileTypeJson type,
+                                          int templateNr,
+                                          QString const &fname) const = 0;
                        
     virtual void dc_autoRequest(bool on)  const =0;
         // on = true:  select that all READ-Requests are sent automatically