diff --git a/concepts/closures/introduction.md b/concepts/closures/introduction.md
index 9d8409cb42..a09ba8e78f 100644
--- a/concepts/closures/introduction.md
+++ b/concepts/closures/introduction.md
@@ -105,7 +105,7 @@ const mySecondCounter = makeCounter();
 mySecondCounter();
 // => 1
 
-// It is not affect the first counter.
+// It does not affect the first counter.
 
 myFirstCounter();
 // => 3