diff --git a/Cargo.toml b/Cargo.toml
index 3360721..41f6c1a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,6 +21,7 @@ version = "0.4.3"
 
 [dependencies]
 bitflags = "*"
+libc = "*"
 
 [dev-dependencies]
 rand = "*"
diff --git a/lmdb-sys/Cargo.toml b/lmdb-sys/Cargo.toml
index fc9ccc0..cbdfa41 100644
--- a/lmdb-sys/Cargo.toml
+++ b/lmdb-sys/Cargo.toml
@@ -11,6 +11,9 @@ documentation = "http://rust-ci.org/danburkert/lmdb-rs/doc/lmdb-sys/"
 
 build = "build.rs"
 
+[dependencies]
+libc = "*"
+
 [build-dependencies]
 pkg-config = "*"
 gcc = "*"
diff --git a/lmdb-sys/src/lib.rs b/lmdb-sys/src/lib.rs
index a97b824..217fd92 100644
--- a/lmdb-sys/src/lib.rs
+++ b/lmdb-sys/src/lib.rs
@@ -1,5 +1,4 @@
 #![allow(non_camel_case_types)]
-#![feature(libc)]
 
 extern crate libc;
 
diff --git a/src/lib.rs b/src/lib.rs
index 06dc2f4..72a92cb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,7 @@
 //! Idiomatic and safe APIs for interacting with the
 //! [Symas Lightning Memory-Mapped Database (LMDB)](http://symas.com/mdb/).
 
-#![feature(libc, optin_builtin_traits, unsafe_destructor)]
+#![feature(optin_builtin_traits, unsafe_destructor)]
 #![cfg_attr(test, feature(std_misc, test))]
 
 extern crate libc;