diff --git a/LogIn.aspx.vb b/LogIn.aspx.vb
index 3cf8db7c6..1ec1f9d38 100644
--- a/LogIn.aspx.vb
+++ b/LogIn.aspx.vb
@@ -11,7 +11,7 @@ Partial Class LogIn
 #Region "  PROPIEDADES  "
     Private Property CveUsuario As Integer
         Get
-            Return ViewState("CveUsuario").ToString.ToEntero
+            Return IfNull(ViewState("CveUsuario"), "-1").ToString.ToEntero
         End Get
         Set(value As Integer)
             ViewState("CveUsuario") = value