diff --git a/docs/src/guide/filesystem.rst b/docs/src/guide/filesystem.rst
index f4004c460..06a1bf845 100644
--- a/docs/src/guide/filesystem.rst
+++ b/docs/src/guide/filesystem.rst
@@ -40,7 +40,7 @@ File descriptors are closed using
 
 .. code-block:: c
 
-    int uv_fs_close(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb)
+    int uv_fs_close(uv_loop_t* loop, uv_fs_t* req, uv_os_fd_t fd, uv_fs_cb cb)
 
 
 Filesystem operation callbacks have the signature:
diff --git a/docs/src/guide/utilities.rst b/docs/src/guide/utilities.rst
index fe3c0da6b..33e036dd4 100644
--- a/docs/src/guide/utilities.rst
+++ b/docs/src/guide/utilities.rst
@@ -370,7 +370,7 @@ terminal information.
 The first thing to do is to initialize a ``uv_tty_t`` with the file descriptor
 it reads/writes from. This is achieved with::
 
-    int uv_tty_init(uv_loop_t*, uv_tty_t*, uv_file fd, int readable)
+    int uv_tty_init(uv_loop_t*, uv_tty_t*, uv_os_fd_t fd, int readable)
 
 Set ``readable`` to true if you plan to use ``uv_read_start()`` on the stream.