diff --git a/ba/ba0.cpp b/ba/ba0.cpp
index c5f5a38a5..38898a1bb 100755
--- a/ba/ba0.cpp
+++ b/ba/ba0.cpp
@@ -3,6 +3,7 @@
 #include <applicat.h>
 #include <colors.h>  
 #include <config.h>
+#include <dongle.h>
 #include <execp.h>
 #include <isam.h>
 #include <msksheet.h>
@@ -1328,6 +1329,7 @@ bool TMenu_application::check_user()
       if (ok)
       {
         user() = utente;
+        dongle().logout();
         ok = get_serial_number() >= 0;
         if (!ok) 
           error_box("Probabilmente e' stato superato il numero massimo di utenti");