diff --git a/library/std/src/os/fd/owned.rs b/library/std/src/os/fd/owned.rs
index 3a1b04a83fa7..37250e6a0ae4 100644
--- a/library/std/src/os/fd/owned.rs
+++ b/library/std/src/os/fd/owned.rs
@@ -205,6 +205,7 @@ pub trait AsFd {
     /// ```rust,no_run
     /// use std::fs::File;
     /// # use std::io;
+    /// # #[cfg(any(unix, target_os = "wasi"))]
     /// # use std::os::fd::{AsFd, BorrowedFd};
     ///
     /// let mut f = File::open("foo.txt")?;
diff --git a/library/std/src/os/fd/raw.rs b/library/std/src/os/fd/raw.rs
index 42a9effcf92a..f92a05066706 100644
--- a/library/std/src/os/fd/raw.rs
+++ b/library/std/src/os/fd/raw.rs
@@ -42,6 +42,7 @@ pub trait AsRawFd {
     /// ```no_run
     /// use std::fs::File;
     /// # use std::io;
+    /// #[cfg(any(unix, target_os = "wasi"))]
     /// use std::os::fd::{AsRawFd, RawFd};
     ///
     /// let mut f = File::open("foo.txt")?;
@@ -80,6 +81,7 @@ pub trait FromRawFd {
     /// ```no_run
     /// use std::fs::File;
     /// # use std::io;
+    /// #[cfg(any(unix, target_os = "wasi"))]
     /// use std::os::fd::{FromRawFd, IntoRawFd, RawFd};
     ///
     /// let f = File::open("foo.txt")?;
@@ -115,6 +117,7 @@ pub trait IntoRawFd {
     /// ```no_run
     /// use std::fs::File;
     /// # use std::io;
+    /// #[cfg(any(unix, target_os = "wasi"))]
     /// use std::os::fd::{IntoRawFd, RawFd};
     ///
     /// let f = File::open("foo.txt")?;