diff --git a/login/login_FLEX.aspx.vb b/login/login_FLEX.aspx.vb
index 5c3ec2b..256f537 100644
--- a/login/login_FLEX.aspx.vb
+++ b/login/login_FLEX.aspx.vb
@@ -26,7 +26,7 @@ Partial Class login_FLEX
         If reqfieldvaluserID.IsValid Then
             user_ID = tb.Text
         Else
-            user_ID = ""
+            user_ID = String.Empty
         End If
         ' Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
         Using con As New SqlConnection(ConnectionString)