diff --git a/item_16_generators_instead_of_lists.py b/item_16_generators_instead_of_lists.py
index c180cb0..1c4ff42 100644
--- a/item_16_generators_instead_of_lists.py
+++ b/item_16_generators_instead_of_lists.py
@@ -10,7 +10,7 @@
 
 def index_words(text):
     result = []
-    if next:
+    if text:
         result.append(0)
     for index, letter in enumerate(text):
         if letter == ' ':