diff --git a/library/std/src/collections/mod.rs b/library/std/src/collections/mod.rs
index 130bb5cb2b3c2..71645aadb1d88 100644
--- a/library/std/src/collections/mod.rs
+++ b/library/std/src/collections/mod.rs
@@ -239,7 +239,7 @@
 //! Iterators also provide a series of *adapter* methods for performing common
 //! threads to sequences. Among the adapters are functional favorites like `map`,
 //! `fold`, `skip` and `take`. Of particular interest to collections is the
-//! `rev` adapter, that reverses any iterator that supports this operation. Most
+//! `rev` adapter, which reverses any iterator that supports this operation. Most
 //! collections provide reversible iterators as the way to iterate over them in
 //! reverse order.
 //!