diff --git a/exercises/practice/isogram/isogram.py b/exercises/practice/isogram/isogram.py
index 98b31c5b00e..3cd2ad82b28 100644
--- a/exercises/practice/isogram/isogram.py
+++ b/exercises/practice/isogram/isogram.py
@@ -1,2 +1,2 @@
-def is_isogram(string):
+def is_isogram(phrase):
     pass