diff --git a/src/io/mod.rs b/src/io/mod.rs
index 51c473d..3734c84 100644
--- a/src/io/mod.rs
+++ b/src/io/mod.rs
@@ -309,9 +309,9 @@ cfg_default! {
     #[doc(hidden)]
     pub use stdio::{_eprint, _print};
 
-    pub use stderr::{stderr, Stderr};
-    pub use stdin::{stdin, Stdin};
-    pub use stdout::{stdout, Stdout};
+    pub use stderr::{stderr, Stderr, StderrLock};
+    pub use stdin::{stdin, Stdin, StdinLock};
+    pub use stdout::{stdout, Stdout, StdoutLock};
     pub use timeout::timeout;
 
     mod timeout;
@@ -320,9 +320,3 @@ cfg_default! {
     mod stdio;
     mod stdout;
 }
-
-cfg_unstable_default! {
-    pub use stderr::StderrLock;
-    pub use stdin::StdinLock;
-    pub use stdout::StdoutLock;
-}
diff --git a/src/io/stderr.rs b/src/io/stderr.rs
index 5ff8a02..fc5f4a0 100644
--- a/src/io/stderr.rs
+++ b/src/io/stderr.rs
@@ -1,14 +1,12 @@
 use std::pin::Pin;
 use std::sync::Mutex;
 use std::future::Future;
+use std::io::Write as _;
 
 use crate::io::{self, Write};
 use crate::task::{spawn_blocking, Context, JoinHandle, Poll};
 
-cfg_unstable! {
-    use once_cell::sync::Lazy;
-    use std::io::Write as _;
-}
+use once_cell::sync::Lazy;
 
 /// Constructs a new handle to the standard error of the current process.
 ///
@@ -65,13 +63,9 @@ pub struct Stderr(Mutex<State>);
 ///
 /// [`Write`]: trait.Read.html
 /// [`Stderr::lock`]: struct.Stderr.html#method.lock
-#[cfg(feature = "unstable")]
-#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
 #[derive(Debug)]
 pub struct StderrLock<'a>(std::io::StderrLock<'a>);
 
-#[cfg(feature = "unstable")]
-#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
 unsafe impl Send for StderrLock<'_> {}
 
 /// The state of the asynchronous stderr.
@@ -128,8 +122,6 @@ impl Stderr {
     /// #
     /// # Ok(()) }) }
     /// ```
-    #[cfg_attr(feature = "docs", doc(cfg(unstable)))]
-    #[cfg(any(feature = "unstable", feature = "docs"))]
     pub async fn lock(&self) -> StderrLock<'static> {
         static STDERR: Lazy<std::io::Stderr> = Lazy::new(std::io::stderr);
 
@@ -240,8 +232,6 @@ cfg_windows! {
     }
 }
 
-#[cfg(feature = "unstable")]
-#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
 impl io::Write for StderrLock<'_> {
     fn poll_write(
         mut self: Pin<&mut Self>,
diff --git a/src/io/stdin.rs b/src/io/stdin.rs
index 369ccae..b299d09 100644
--- a/src/io/stdin.rs
+++ b/src/io/stdin.rs
@@ -1,16 +1,14 @@
 use std::future::Future;
 use std::pin::Pin;
 use std::sync::Mutex;
+use std::io::Read as _;
 
 use crate::future;
 use crate::io::{self, Read};
 use crate::task::{spawn_blocking, Context, JoinHandle, Poll};
 use crate::utils::Context as _;
 
-cfg_unstable! {
-    use once_cell::sync::Lazy;
-    use std::io::Read as _;
-}
+use once_cell::sync::Lazy;
 
 /// Constructs a new handle to the standard input of the current process.
 ///
@@ -67,13 +65,9 @@ pub struct Stdin(Mutex<State>);
 ///
 /// [`Read`]: trait.Read.html
 /// [`Stdin::lock`]: struct.Stdin.html#method.lock
-#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
-#[cfg(feature = "unstable")]
 #[derive(Debug)]
 pub struct StdinLock<'a>(std::io::StdinLock<'a>);
 
-#[cfg(feature = "unstable")]
-#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
 unsafe impl Send for StdinLock<'_> {}
 
 /// The state of the asynchronous stdin.
@@ -187,8 +181,6 @@ impl Stdin {
     /// #
     /// # Ok(()) }) }
     /// ```
-    #[cfg_attr(feature = "docs", doc(cfg(unstable)))]
-    #[cfg(any(feature = "unstable", feature = "docs"))]
     pub async fn lock(&self) -> StdinLock<'static> {
         static STDIN: Lazy<std::io::Stdin> = Lazy::new(std::io::stdin);
 
@@ -266,8 +258,6 @@ cfg_windows! {
     }
 }
 
-#[cfg(feature = "unstable")]
-#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
 impl Read for StdinLock<'_> {
     fn poll_read(
         mut self: Pin<&mut Self>,
diff --git a/src/io/stdout.rs b/src/io/stdout.rs
index 1711c09..d98ef13 100644
--- a/src/io/stdout.rs
+++ b/src/io/stdout.rs
@@ -1,14 +1,12 @@
 use std::pin::Pin;
 use std::sync::Mutex;
 use std::future::Future;
+use std::io::Write as _;
 
 use crate::io::{self, Write};
 use crate::task::{spawn_blocking, Context, JoinHandle, Poll};
 
-cfg_unstable! {
-    use once_cell::sync::Lazy;
-    use std::io::Write as _;
-}
+use once_cell::sync::Lazy;
 
 /// Constructs a new handle to the standard output of the current process.
 ///
@@ -65,13 +63,9 @@ pub struct Stdout(Mutex<State>);
 ///
 /// [`Write`]: trait.Read.html
 /// [`Stdout::lock`]: struct.Stdout.html#method.lock
-#[cfg(feature = "unstable")]
-#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
 #[derive(Debug)]
 pub struct StdoutLock<'a>(std::io::StdoutLock<'a>);
 
-#[cfg(feature = "unstable")]
-#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
 unsafe impl Send for StdoutLock<'_> {}
 
 /// The state of the asynchronous stdout.
@@ -128,8 +122,6 @@ impl Stdout {
     /// #
     /// # Ok(()) }) }
     /// ```
-    #[cfg_attr(feature = "docs", doc(cfg(unstable)))]
-    #[cfg(any(feature = "unstable", feature = "docs"))]
     pub async fn lock(&self) -> StdoutLock<'static> {
         static STDOUT: Lazy<std::io::Stdout> = Lazy::new(std::io::stdout);
 
@@ -240,8 +232,6 @@ cfg_windows! {
     }
 }
 
-#[cfg(feature = "unstable")]
-#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
 impl Write for StdoutLock<'_> {
     fn poll_write(
         mut self: Pin<&mut Self>,