diff --git a/pr/pr0600.cpp b/pr/pr0600.cpp
index 288182c39..a23c65ab6 100755
--- a/pr/pr0600.cpp
+++ b/pr/pr0600.cpp
@@ -203,7 +203,7 @@ void TGestione_percprovv_app::init_query_mode(TMask& m)
   m.hide(F_CODPR_NEW);
   m.show(F_CODPR_QUERY);
   set_search_field(F_CODPR_QUERY);
-  m.hide(-1);
+  m.hide(-G_CAMPICHIAVE);
   for (short i = F_CLIENTE; i<=F_CODRFA; i+=2)
     m.field(i).check_type(CHECK_NONE); // Il flag di forced rimane  a TRUE
 }
@@ -213,7 +213,7 @@ void TGestione_percprovv_app::init_query_insert_mode(TMask& m)
   m.hide(F_CODPR_QUERY);
   m.show(F_CODPR_NEW);
   set_search_field(F_CODPR_NEW);
-  m.hide(-1);
+  m.hide(-G_CAMPICHIAVE);
   for (short i = F_CLIENTE; i<=F_CODRFA; i+=2)
     m.field(i).check_type(CHECK_NONE); // Il flag di forced rimane  a TRUE
 }