diff --git a/Cargo.toml b/Cargo.toml
index ae2a1bf..de25f59 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,6 @@ license = "MIT"
 [lib]
 name = "cocoa"
 crate-type = ["rlib"]
+
+[dependencies]
+bitflags = "0.1"
diff --git a/src/lib.rs b/src/lib.rs
index 746ad48..9fd21ce 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -12,6 +12,8 @@
 
 #![allow(missing_copy_implementations, non_snake_case, unstable)]
 
+#[macro_use]
+extern crate bitflags;
 extern crate libc;
 
 #[cfg(target_os="macos")]