diff --git a/src/size.rs b/src/size.rs
index 926f32f..2f17719 100644
--- a/src/size.rs
+++ b/src/size.rs
@@ -15,17 +15,25 @@ struct TermSize {
 // Since attributes on non-item statements is not stable yet, we use a function.
 #[cfg(not(target_os = "redox"))]
 #[cfg(target_pointer_width = "64")]
+#[cfg(not(target_env = "musl"))]
 fn tiocgwinsz() -> u64 {
     use termios::TIOCGWINSZ;
     TIOCGWINSZ as u64
 }
 #[cfg(not(target_os = "redox"))]
 #[cfg(target_pointer_width = "32")]
+#[cfg(not(target_env = "musl"))]
 fn tiocgwinsz() -> u32 {
     use termios::TIOCGWINSZ;
     TIOCGWINSZ as u32
 }
 
+#[cfg(target_env = "musl")]
+fn tiocgwinsz() -> i32 {
+    use termios::TIOCGWINSZ;
+    TIOCGWINSZ as i32
+}
+
 
 /// Get the size of the terminal.
 #[cfg(not(target_os = "redox"))]
@@ -50,8 +58,12 @@ pub fn terminal_size() -> io::Result<(u16, u16)> {
 pub fn terminal_size() -> io::Result<(u16, u16)> {
     use std::env;
 
-    let width = try!(env::var("COLUMNS").map_err(|x| io::Error::new(io::ErrorKind::NotFound, x))).parse().unwrap_or(0);
-    let height = try!(env::var("LINES").map_err(|x| io::Error::new(io::ErrorKind::NotFound, x))).parse().unwrap_or(0);
+    let width = try!(env::var("COLUMNS").map_err(|x| io::Error::new(io::ErrorKind::NotFound, x)))
+        .parse()
+        .unwrap_or(0);
+    let height = try!(env::var("LINES").map_err(|x| io::Error::new(io::ErrorKind::NotFound, x)))
+        .parse()
+        .unwrap_or(0);
 
     Ok((width, height))
 }