diff --git a/exercises/word-count/word_count.py b/exercises/word-count/word_count.py
index d1741341da..038cea7307 100644
--- a/exercises/word-count/word_count.py
+++ b/exercises/word-count/word_count.py
@@ -1,2 +1,2 @@
-def word_count():
+def word_count(sentence):
     pass