diff --git a/src/libcore/iter/iterator.rs b/src/libcore/iter/iterator.rs
index b3f4d75c4da61..67b97afb9769a 100644
--- a/src/libcore/iter/iterator.rs
+++ b/src/libcore/iter/iterator.rs
@@ -119,7 +119,7 @@ pub trait Iterator {
     /// // exactly wouldn't be possible without executing filter().
     /// assert_eq!((0, Some(10)), iter.size_hint());
     ///
-    /// // Let's add one five more numbers with chain()
+    /// // Let's add five more numbers with chain()
     /// let iter = (0..10).filter(|x| x % 2 == 0).chain(15..20);
     ///
     /// // now both bounds are increased by five