diff --git a/lmdb-sys/build.rs b/lmdb-sys/build.rs
index 9818abb..3cc0283 100644
--- a/lmdb-sys/build.rs
+++ b/lmdb-sys/build.rs
@@ -1,3 +1,5 @@
+#![allow(unstable)]
+
 extern crate "pkg-config" as pkg_config;
 extern crate bindgen;
 extern crate gcc;
diff --git a/lmdb-sys/src/lib.rs b/lmdb-sys/src/lib.rs
index 881be80..226ba95 100644
--- a/lmdb-sys/src/lib.rs
+++ b/lmdb-sys/src/lib.rs
@@ -4,6 +4,7 @@
     non_camel_case_types,
     non_snake_case,
     raw_pointer_derive,
+    unstable,
    )]
 #![feature(plugin)]