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diff --git a/third_party/rust/tokio/src/fs/create_dir.rs b/third_party/rust/tokio/src/fs/create_dir.rs
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+++ b/third_party/rust/tokio/src/fs/create_dir.rs
@@ -0,0 +1,52 @@
+use crate::fs::asyncify;
+
+use std::io;
+use std::path::Path;
+
+/// Creates a new, empty directory at the provided path
+///
+/// This is an async version of [`std::fs::create_dir`][std]
+///
+/// [std]: std::fs::create_dir
+///
+/// # Platform-specific behavior
+///
+/// This function currently corresponds to the `mkdir` function on Unix
+/// and the `CreateDirectory` function on Windows.
+/// Note that, this [may change in the future][changes].
+///
+/// [changes]: https://doc.rust-lang.org/std/io/index.html#platform-specific-behavior
+///
+/// **NOTE**: If a parent of the given path doesn't exist, this function will
+/// return an error. To create a directory and all its missing parents at the
+/// same time, use the [`create_dir_all`] function.
+///
+/// # Errors
+///
+/// This function will return an error in the following situations, but is not
+/// limited to just these cases:
+///
+/// * User lacks permissions to create directory at `path`.
+/// * A parent of the given path doesn't exist. (To create a directory and all
+///   its missing parents at the same time, use the [`create_dir_all`]
+///   function.)
+/// * `path` already exists.
+///
+/// [`create_dir_all`]: super::create_dir_all()
+///
+/// # Examples
+///
+/// ```no_run
+/// use tokio::fs;
+/// use std::io;
+///
+/// #[tokio::main]
+/// async fn main() -> io::Result<()> {
+///     fs::create_dir("/some/dir").await?;
+///     Ok(())
+/// }
+/// ```
+pub async fn create_dir(path: impl AsRef<Path>) -> io::Result<()> {
+    let path = path.as_ref().to_owned();
+    asyncify(move || std::fs::create_dir(path)).await
+}