diff --git a/src/lib.rs b/src/lib.rs
index ae117ea..a3fd51f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -26,3 +26,5 @@ mod arch;
 
 #[cfg(feature = "os")]
 pub mod os;
+#[cfg(feature = "os")]
+mod sys;
diff --git a/src/os.rs b/src/os.rs
index b21572a..bdfa96f 100644
--- a/src/os.rs
+++ b/src/os.rs
@@ -2,9 +2,7 @@ extern crate std;
 use core::prelude::*;
 use self::std::io::Error as IoError;
 use stack;
-
-#[cfg(unix)]
-#[path = "os/unix.rs"] mod sys;
+use sys;
 
 pub struct StackSource;
 
diff --git a/src/sys/mod.rs b/src/sys/mod.rs
new file mode 100644
index 0000000..34f3dcb
--- /dev/null
+++ b/src/sys/mod.rs
@@ -0,0 +1,5 @@
+pub use self::imp::*;
+
+#[cfg(unix)]
+#[path = "unix.rs"]
+mod imp;
diff --git a/src/os/unix.rs b/src/sys/unix.rs
similarity index 100%
rename from src/os/unix.rs
rename to src/sys/unix.rs