diff --git a/main_form.cs b/main_form.cs
index b7947ee..b5fb2a8 100644
--- a/main_form.cs
+++ b/main_form.cs
@@ -96,7 +96,7 @@ namespace KRY_0x01_ng
             Match match = Regex.Match(str_to_check, @"\d|\s+");
             if (match.Success)
             {
-                MessageBox.Show("Only alphabetic characters and spaces are allowed.\nCheck the key for numbers, symbols or tab whitespace and remove them before continuing.", "Error");
+                MessageBox.Show("Only alphabetic characters are allowed.\nCheck the key for numbers, symbols or tab whitespace and remove them before continuing.", "Error");
                 return success = false;
             }