diff --git a/ch07-comprehensions/e29b3_age_in_months.py b/ch07-comprehensions/e29b3_age_in_months.py
index 1055b33..e4cbf88 100755
--- a/ch07-comprehensions/e29b3_age_in_months.py
+++ b/ch07-comprehensions/e29b3_age_in_months.py
@@ -5,5 +5,5 @@
 
 def age_in_months(list_of_people):
     return [dict(**one_person, age_in_months=one_person['age'] * 12)
-            for one_person in mylist
+            for one_person in list_of_people
             if one_person['age'] <= 20]