diff --git a/src/file/imp/mod.rs b/src/file/imp/mod.rs
index ceb630ef9..fbb2bbf63 100644
--- a/src/file/imp/mod.rs
+++ b/src/file/imp/mod.rs
@@ -1,4 +1,4 @@
-cfg_if! {
+cfg_if::cfg_if! {
     if #[cfg(any(unix, target_os = "redox", target_os = "wasi"))] {
         mod unix;
         pub use self::unix::*;
diff --git a/src/file/imp/unix.rs b/src/file/imp/unix.rs
index 89249fd34..480743cf7 100644
--- a/src/file/imp/unix.rs
+++ b/src/file/imp/unix.rs
@@ -2,7 +2,7 @@ use std::env;
 use std::ffi::{CString, OsStr};
 use std::fs::{self, File, OpenOptions};
 use std::io;
-cfg_if! {
+cfg_if::cfg_if! {
     if #[cfg(not(target_os = "wasi"))] {
         use std::os::unix::ffi::OsStrExt;
         use std::os::unix::fs::{MetadataExt, OpenOptionsExt};
diff --git a/src/lib.rs b/src/lib.rs
index d89798f50..eba62cb64 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -127,15 +127,8 @@
 #![allow(clippy::redundant_field_names)]
 #![cfg_attr(feature = "nightly", feature(wasi_ext))]
 
-#[macro_use]
-extern crate cfg_if;
-
-#[cfg(doctest)]
-#[macro_use]
-extern crate doc_comment;
-
 #[cfg(doctest)]
-doctest!("../README.md");
+doc_comment::doctest!("../README.md");
 
 const NUM_RETRIES: u32 = 1 << 31;
 const NUM_RAND_CHARS: usize = 6;