diff --git a/components/script/dom/bindings/js.rs b/components/script/dom/bindings/js.rs
index 6441bed6746..c35b4905ceb 100644
--- a/components/script/dom/bindings/js.rs
+++ b/components/script/dom/bindings/js.rs
@@ -461,6 +461,13 @@ pub trait RootedReference<'root> {
     fn r(&'root self) -> Self::Ref;
 }
 
+impl<'root, T: JSTraceable + Reflectable + 'root> RootedReference<'root> for [JS<T>] {
+    type Ref = &'root [&'root T];
+    fn r(&'root self) -> &'root [&'root T] {
+        unsafe { mem::transmute(self) }
+    }
+}
+
 impl<'root, T: Reflectable + 'root> RootedReference<'root> for Rc<T> {
     type Ref = &'root T;
     fn r(&'root self) -> &'root T {
diff --git a/components/script/dom/bindings/trace.rs b/components/script/dom/bindings/trace.rs
index 4e37dd45aa0..a81236fc477 100644
--- a/components/script/dom/bindings/trace.rs
+++ b/components/script/dom/bindings/trace.rs
@@ -36,7 +36,7 @@ use devtools_traits::CSSError;
 use devtools_traits::WorkerId;
 use dom::abstractworker::SharedRt;
 use dom::bindings::cell::DOMRefCell;
-use dom::bindings::js::{JS, Root, RootedReference};
+use dom::bindings::js::{JS, Root};
 use dom::bindings::refcounted::{Trusted, TrustedPromise};
 use dom::bindings::reflector::{Reflectable, Reflector};
 use dom::bindings::str::{DOMString, USVString};
@@ -80,7 +80,6 @@ use std::boxed::FnBox;
 use std::cell::{Cell, UnsafeCell};
 use std::collections::{BTreeMap, HashMap, HashSet};
 use std::hash::{BuildHasher, Hash};
-use std::mem;
 use std::ops::{Deref, DerefMut};
 use std::path::PathBuf;
 use std::rc::Rc;
@@ -553,13 +552,6 @@ impl<'a, T: JSTraceable + Reflectable> RootedVec<'a, JS<T>> {
     }
 }
 
-impl<'a, 'root, T: JSTraceable + Reflectable + 'root> RootedReference<'root> for RootedVec<'a, JS<T>> {
-    type Ref = &'root [&'root T];
-    fn r(&'root self) -> &'root [&'root T] {
-        unsafe { mem::transmute(&self[..]) }
-    }
-}
-
 impl<'a, T: JSTraceable> Drop for RootedVec<'a, T> {
     fn drop(&mut self) {
         self.clear();