diff --git a/Course3/Lab4/validations.py b/Course3/Lab4/validations.py
index e3f9c22d82..30b46f9588 100644
--- a/Course3/Lab4/validations.py
+++ b/Course3/Lab4/validations.py
@@ -18,6 +18,7 @@ def validate_user(username, minlen):
     # Usernames can't begin with a number
     if username[0].isnumeric():
         return False
+#Fixing the error by checking the first character:
     if username[0] == '.' or username[0] == '_':
         return False
     return True