diff --git a/build.rs b/build.rs
index a151502a..b2813e03 100644
--- a/build.rs
+++ b/build.rs
@@ -1,4 +1,5 @@
 #![allow(unstable)]
+#![feature(old_io,old_path,os)]
 extern crate gl_generator;
 extern crate khronos_api;
 
diff --git a/src/lib.rs b/src/lib.rs
index 54f4b168..e7d7b68f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(unsafe_destructor)]
+#![feature(unsafe_destructor,core,std_misc)]
 #![unstable]
 #![allow(unstable)]