diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
index 2196e53502f..24e2684496c 100644
--- a/Doc/library/itertools.rst
+++ b/Doc/library/itertools.rst
@@ -758,10 +758,10 @@ which incur interpreter overhead.
        "Return first n items of the iterable as a list"
        return list(islice(iterable, n))
 
-   def prepend(value, iterator):
-       "Prepend a single value in front of an iterator"
+   def prepend(value, iterable):
+       "Prepend a single value in front of an iterable"
        # prepend(1, [2, 3, 4]) --> 1 2 3 4
-       return chain([value], iterator)
+       return chain([value], iterable)
 
    def tabulate(function, start=0):
        "Return function(0), function(1), ..."