diff --git a/challenges/advanced-generic-class/question.py b/challenges/advanced-generic-class/question.py
index d9c0cec..8e7197e 100644
--- a/challenges/advanced-generic-class/question.py
+++ b/challenges/advanced-generic-class/question.py
@@ -3,7 +3,7 @@
 
 Define a generic class that represents a stack.
 It can be instantiated with a certain type, with method `push` accepting an object of the specified type,
-and `pop` returning an an object of the same type
+and `pop` returning an object of the same type
 """