diff --git a/ca/calib01.cpp b/ca/calib01.cpp
index 6ee7919e6..1105a3a18 100755
--- a/ca/calib01.cpp
+++ b/ca/calib01.cpp
@@ -448,7 +448,7 @@ static const TString& ca_get_user_permissions(const TString& utente, const int l
       
       //che programma sono che chiamo questa funzione?
       const TFilename prog_name = main_app().argv(0);
-      TString8 key = prog_name.name_only();
+      TString16 key = prog_name.name_only();
       key << " " << main_app().argv(1);
 
       TToken_string row(80, SAFE_PIPE_CHR);