diff --git a/examples/noop-tokenize.rs b/examples/noop-tokenize.rs
index ea91e3a1..db32da19 100644
--- a/examples/noop-tokenize.rs
+++ b/examples/noop-tokenize.rs
@@ -9,7 +9,7 @@
 
 // Run a single benchmark once.  For use with profiling tools.
 
-#![feature(core, os, io, test, path)]
+#![feature(core, env, os, io, test, path)]
 
 extern crate test;
 extern crate html5ever;
diff --git a/src/lib.rs b/src/lib.rs
index b5e8593f..b955aa73 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,7 +10,7 @@
 #![crate_name="html5ever"]
 #![crate_type="dylib"]
 
-#![feature(plugin, int_uint, box_syntax)]
+#![feature(plugin, int_uint, box_syntax, no_std)]
 #![feature(core, hash, collections, alloc)]
 #![cfg_attr(not(for_c), feature(io))]
 #![cfg_attr(for_c, feature(libc))]
diff --git a/tests/html5ever-external-test.rs b/tests/html5ever-external-test.rs
index 3b419b5d..1ba641e2 100644
--- a/tests/html5ever-external-test.rs
+++ b/tests/html5ever-external-test.rs
@@ -11,7 +11,7 @@
 #![crate_type="bin"]
 
 #![feature(plugin)]
-#![feature(rustc_private, core, io, os, path, std_misc, test)]
+#![feature(rustc_private, core, env, io, os, path, std_misc, test)]
 
 extern crate test;
 extern crate serialize;