diff --git a/labs02/task04.py b/labs02/task04.py
index 5eeac7a..39baad1 100644
--- a/labs02/task04.py
+++ b/labs02/task04.py
@@ -10,7 +10,8 @@ def sum_from_one_to_n(n):
     if n < 0:
         return 0
     else:
-        for i in range(n):
+        x = 0
+        for i in range(n+1):
             x = x + i
     return x