diff --git a/src/libcore/iter/mod.rs b/src/libcore/iter/mod.rs
index a3b755a38f3..f87bbfbd7d9 100644
--- a/src/libcore/iter/mod.rs
+++ b/src/libcore/iter/mod.rs
@@ -520,7 +520,7 @@ fn size_hint(&self) -> (usize, Option<usize>) {
 #[unstable(feature = "fused", issue = "35602")]
 impl<I> FusedIterator for Cycle<I> where I: Clone + Iterator {}
 
-/// An iterator that steps by n elements every iteration.
+/// An adapter for stepping iterators by a custom amount.
 ///
 /// This `struct` is created by the [`step_by`] method on [`Iterator`]. See
 /// its documentation for more.