diff --git a/Lib/sets.py b/Lib/sets.py
index 0512846..5ed46d1 100644
--- a/Lib/sets.py
+++ b/Lib/sets.py
@@ -32,7 +32,7 @@
 
 Only hashable objects can be added to a Set. In particular, you cannot
 really add a Set as an element to another Set; if you try, what is
-actuallly added is an ImmutableSet built from it (it compares equal to
+actually added is an ImmutableSet built from it (it compares equal to
 the one you tried adding).
 
 When you ask if `x in y' where x is a Set and y is a Set or