diff --git a/src/lib.rs b/src/lib.rs
index 4231591..d274343 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,11 +4,11 @@
 //!
 //! ```test_harness,no_run
 //! extern crate open;
-//! 
+//!
 //! # #[test]
 //! # fn doit() {
 //! open::that("/path/to/file/with.fancy-extension");
-//! if open::that("https://google.de").is_ok() {
+//! if open::that("https://rust-lang.org").is_ok() {
 //!     println!("Look at your browser !");
 //! }
 //! # }
@@ -16,16 +16,17 @@
 //!
 //! # Notes
 //! As an operating system program is used, chances are that the open operation fails.
-//! Therfore, you are advised to at least check the result with `.is_err()` and 
+//! Therfore, you are advised to at least check the result with `.is_err()` and
 //! behave accordingly, e.g. by letting the user know what you tried to open, and failed.
 use std::io;
 use std::process::{Command, ExitStatus};
+use std::ffi::OsStr;
 
 #[cfg(not(any(target_os = "windows", target_os = "macos")))]
-pub fn that(path: &str) -> io::Result<ExitStatus> {
+pub fn that<T:AsRef<OsStr>+Sized>(path: T) -> io::Result<ExitStatus> {
     let mut last_err: io::Result<ExitStatus> = Err(io::Error::from_raw_os_error(0));
     for program in &["xdg-open", "gnome-open", "kde-open"] {
-        match Command::new(program).arg(path).spawn() {
+        match Command::new(program).arg(path.as_ref()).spawn() {
             Ok(mut child) => return child.wait(),
             Err(err) => {
                 last_err = Err(err);
@@ -37,11 +38,11 @@ pub fn that(path: &str) -> io::Result<ExitStatus> {
 }
 
 #[cfg(target_os = "windows")]
-pub fn that(path: &str) -> io::Result<ExitStatus> {
-    try!(Command::new("cmd").arg("/C").arg("start").arg(path).spawn()).wait()
+pub fn that<T:AsRef<OsStr>+Sized>(path: T) -> io::Result<ExitStatus> {
+    try!(Command::new("cmd").arg("/C").arg("start").arg(path.as_ref()).spawn()).wait()
 }
 
 #[cfg(target_os = "macos")]
-pub fn that(path: &str) -> io::Result<ExitStatus> {
-    try!(Command::new("open").arg(path).spawn()).wait()
+pub fn that<T:AsRef<OsStr>+Sized>(path: T) -> io::Result<ExitStatus> {
+    try!(Command::new("open").arg(path.as_ref()).spawn()).wait()
 }