diff --git a/Doc/tutorial/datastructures.rst b/Doc/tutorial/datastructures.rst
index 7ec044c..12b5c57 100644
--- a/Doc/tutorial/datastructures.rst
+++ b/Doc/tutorial/datastructures.rst
@@ -181,7 +181,7 @@
 
    squares = [x**2 for x in range(10)]
 
-This is also equivalent to ``squares = map(lambda x: x**2, range(10))``,
+This is also equivalent to ``squares = list(map(lambda x: x**2, range(10)))``,
 but it's more concise and readable.
 
 A list comprehension consists of brackets containing an expression followed