diff --git a/src/stream/from_fn.rs b/src/stream/from_fn.rs
index 24432c7e..e4078662 100644
--- a/src/stream/from_fn.rs
+++ b/src/stream/from_fn.rs
@@ -28,6 +28,7 @@ impl<F> Unpin for FromFn<F> {}
 /// #
 /// use async_std::prelude::*;
 /// use async_std::stream;
+/// use async_std::sync::{Arc, Mutex};
 ///
 /// let mut count = 0u8;
 /// let s = stream::from_fn(|| {
diff --git a/src/sync/mod.rs b/src/sync/mod.rs
index fdeb48c3..088c520b 100644
--- a/src/sync/mod.rs
+++ b/src/sync/mod.rs
@@ -155,9 +155,7 @@
 //! ```
 //! # async_std::task::block_on(async {
 //! #
-//! use std::sync::Arc;
-//!
-//! use async_std::sync::Mutex;
+//! use async_std::sync::{Arc, Mutex};
 //! use async_std::task;
 //!
 //! let m1 = Arc::new(Mutex::new(0));
diff --git a/src/sync/mutex.rs b/src/sync/mutex.rs
index 5bec6a23..2c0ac0cc 100644
--- a/src/sync/mutex.rs
+++ b/src/sync/mutex.rs
@@ -19,9 +19,7 @@ use crate::task::{Context, Poll};
 /// ```
 /// # async_std::task::block_on(async {
 /// #
-/// use std::sync::Arc;
-///
-/// use async_std::sync::Mutex;
+/// use async_std::sync::{Arc, Mutex};
 /// use async_std::task;
 ///
 /// let m = Arc::new(Mutex::new(0));
@@ -77,9 +75,7 @@ impl<T> Mutex<T> {
     /// ```
     /// # async_std::task::block_on(async {
     /// #
-    /// use std::sync::Arc;
-    ///
-    /// use async_std::sync::Mutex;
+    /// use async_std::sync::{Arc, Mutex};
     /// use async_std::task;
     ///
     /// let m1 = Arc::new(Mutex::new(10));
@@ -155,9 +151,7 @@ impl<T> Mutex<T> {
     /// ```
     /// # async_std::task::block_on(async {
     /// #
-    /// use std::sync::Arc;
-    ///
-    /// use async_std::sync::Mutex;
+    /// use async_std::sync::{Arc, Mutex};
     /// use async_std::task;
     ///
     /// let m1 = Arc::new(Mutex::new(10));