diff --git a/include/relapp.cpp b/include/relapp.cpp
index 89f123d76..b4dd4b3eb 100755
--- a/include/relapp.cpp
+++ b/include/relapp.cpp
@@ -522,7 +522,7 @@ bool TRelation_application::test_key(
        e != NULL; 
        e = _mask->get_key_field(k, FALSE))
   {
-    if (e->required())
+    if (e->required() && e->shown())
     {
       onereq = TRUE;
       if (e->empty())