diff --git a/src/libcore/iter/iterator.rs b/src/libcore/iter/iterator.rs
index b27bd3142e1ed..d22c5376211a7 100644
--- a/src/libcore/iter/iterator.rs
+++ b/src/libcore/iter/iterator.rs
@@ -366,8 +366,7 @@ pub trait Iterator {
     ///
     /// In other words, it zips two iterators together, into a single one.
     ///
-    /// When either iterator returns [`None`], all further calls to [`next`]
-    /// will return [`None`].
+    /// If either iterator returns [`None`], [`next`] will return [`None`].
     ///
     /// # Examples
     ///