diff --git a/include/applicat.cpp b/include/applicat.cpp
index 883e4ca44..0d48e3a09 100755
--- a/include/applicat.cpp
+++ b/include/applicat.cpp
@@ -140,7 +140,7 @@ void TBanner::handler(WINDOW win, EVENT* ep)
     TWindow::handler(win, ep);
 }
 
-long TApplication::task_eh(WINDOW win, EVENT *ep)
+long XVT_CALLCONV1 TApplication::task_eh(WINDOW win, EVENT *ep)
 {
   switch (ep->type)
   {
@@ -452,8 +452,8 @@ void TApplication::about() const
 {                                               
 #include <prassi.ver>             
   const TFilename n(__argv[0]);
-  message_box("PRASSI Versione %s\nProgramma %s\nLibreria del %s", 
-              VERSION, (const char*)n.name(), __DATE__);
+  message_box("PRASSI Versione %s\nProgramma %s\nLibreria del %s\nN.ro di serie %d-%s", 
+              VERSION, (const char*)n.name(), __DATE__, SerNo, INTERNAL_VERSION);
 }
 
 // Risposta alla selezione Stampa del menu File
@@ -661,3 +661,5 @@ void TApplication::on_firm_change()
 
 void TApplication::on_config_change()
 {}
+
+