diff --git a/lectures/07-iterators-generators.slim b/lectures/07-iterators-generators.slim
index 80a6c23..38e1b44 100644
--- a/lectures/07-iterators-generators.slim
+++ b/lectures/07-iterators-generators.slim
@@ -352,7 +352,7 @@
                 yield num
                 num += 1
 
-        doulbes = map(lambda num: num*2, numbers())
+        doubles = map(lambda num: num*2, numbers())
 
 = slide 'enumerate' do
     p Когато индексите ни интересуват