3 files changed, 9 insertions, 8 deletions
diff --git a/src/libstd/sys/common/wtf8.rs b/src/libstd/sys/common/wtf8.rs
index fb9d6fef1fa..bea2b6c6b40 100644
--- a/src/libstd/sys/common/wtf8.rs
+++ b/src/libstd/sys/common/wtf8.rs
@@ -38,7 +38,7 @@ use num::Int;
 use ops;
 use slice;
 use str;
-use string::{String, CowString};
+use string::String;
 use sys_common::AsInner;
 use unicode::str::{Utf16Item, utf16_items};
 use vec::Vec;
@@ -530,7 +530,7 @@ impl Wtf8 {
     /// Surrogates are replaced with `"\u{FFFD}"` (the replacement character “�”).
     ///
     /// This only copies the data if necessary (if it contains any surrogate).
-    pub fn to_string_lossy(&self) -> CowString {
+    pub fn to_string_lossy(&self) -> Cow<str> {
         let surrogate_pos = match self.next_surrogate(0) {
             None => return Cow::Borrowed(unsafe { str::from_utf8_unchecked(&self.bytes) }),
             Some((pos, _)) => pos,
@@ -844,7 +844,6 @@ mod tests {
     use borrow::Cow;
     use super::*;
     use mem::transmute;
-    use string::CowString;
 
     #[test]
     fn code_point_from_u32() {
@@ -1224,7 +1223,7 @@ mod tests {
         assert_eq!(Wtf8::from_str("aé 💩").to_string_lossy(), Cow::Borrowed("aé 💩"));
         let mut string = Wtf8Buf::from_str("aé 💩");
         string.push(CodePoint::from_u32(0xD800).unwrap());
-        let expected: CowString = Cow::Owned(String::from_str("aé 💩�"));
+        let expected: Cow<str> = Cow::Owned(String::from_str("aé 💩�"));
         assert_eq!(string.to_string_lossy(), expected);
     }
 
diff --git a/src/libstd/sys/unix/os_str.rs b/src/libstd/sys/unix/os_str.rs
index 023d951dc4f..c8ac524876b 100644
--- a/src/libstd/sys/unix/os_str.rs
+++ b/src/libstd/sys/unix/os_str.rs
@@ -13,11 +13,12 @@
 
 use core::prelude::*;
 
+use borrow::Cow;
 use fmt::{self, Debug};
 use vec::Vec;
 use slice::SliceExt as StdSliceExt;
 use str;
-use string::{String, CowString};
+use string::String;
 use mem;
 
 #[derive(Clone, Hash)]
@@ -76,7 +77,7 @@ impl Slice {
         str::from_utf8(&self.inner).ok()
     }
 
-    pub fn to_string_lossy(&self) -> CowString {
+    pub fn to_string_lossy(&self) -> Cow<str> {
         String::from_utf8_lossy(&self.inner)
     }
 
diff --git a/src/libstd/sys/windows/os_str.rs b/src/libstd/sys/windows/os_str.rs
index af94b56bf1f..ad1e6c4b0e7 100644
--- a/src/libstd/sys/windows/os_str.rs
+++ b/src/libstd/sys/windows/os_str.rs
@@ -11,9 +11,10 @@
 /// The underlying OsString/OsStr implementation on Windows is a
 /// wrapper around the "WTF-8" encoding; see the `wtf8` module for more.
 
+use borrow::Cow;
 use fmt::{self, Debug};
 use sys_common::wtf8::{Wtf8, Wtf8Buf};
-use string::{String, CowString};
+use string::String;
 use result::Result;
 use option::Option;
 use mem;
@@ -70,7 +71,7 @@ impl Slice {
         self.inner.as_str()
     }
 
-    pub fn to_string_lossy(&self) -> CowString {
+    pub fn to_string_lossy(&self) -> Cow<str> {
         self.inner.to_string_lossy()
     }