diff --git a/components/layout/lib.rs b/components/layout/lib.rs
index da4dd55b5f7..8519758ccc9 100644
--- a/components/layout/lib.rs
+++ b/components/layout/lib.rs
@@ -16,7 +16,6 @@
 #![feature(unsafe_no_drop_flag)]
 
 #![deny(unsafe_code)]
-#![allow(unrooted_must_root)]
 
 #![plugin(string_cache_plugin)]
 #![plugin(plugins)]