diff --git a/examples/extract.rs b/examples/extract.rs
index c1f4f8c0..d2597c7d 100644
--- a/examples/extract.rs
+++ b/examples/extract.rs
@@ -1,4 +1,4 @@
-#![feature(path, io, fs, exit_status)]
+#![feature(path, io, exit_status)]
 
 extern crate zip;
 
diff --git a/examples/extract_lorem.rs b/examples/extract_lorem.rs
index 485906b9..023bd276 100644
--- a/examples/extract_lorem.rs
+++ b/examples/extract_lorem.rs
@@ -1,4 +1,4 @@
-#![feature(path, io, fs, exit_status)]
+#![feature(path, io, exit_status)]
 
 use std::io::prelude::*;
 
diff --git a/examples/write_sample.rs b/examples/write_sample.rs
index e1022dec..275f4d59 100644
--- a/examples/write_sample.rs
+++ b/examples/write_sample.rs
@@ -1,4 +1,4 @@
-#![feature(io, fs, path, exit_status)]
+#![feature(io, path, exit_status)]
 
 use std::io::prelude::*;
 
diff --git a/src/result.rs b/src/result.rs
index 31cde8e4..69c9ce7b 100644
--- a/src/result.rs
+++ b/src/result.rs
@@ -26,7 +26,7 @@ pub enum ZipError
 
 impl ZipError
 {
-    fn detail(&self) -> ::std::string::CowString
+    fn detail(&self) -> ::std::borrow::Cow<str>
     {
         use ::std::error::Error;
         use ::std::borrow::IntoCow;