diff --git a/Cargo.toml b/Cargo.toml
index bd3d56f..f4683f5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,3 +6,7 @@ build = "build.rs"
 
 [build-dependencies]
 gcc = "0.3.3"
+
+[features]
+default = ["os"]
+os = []
diff --git a/src/lib.rs b/src/lib.rs
index 62eb963..1a26d3a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -20,4 +20,6 @@ pub mod context;
 pub mod stack;
 
 mod arch;
+
+#[cfg(feature = "os")]
 pub mod os;