diff --git a/src/components/script/dom/performance.rs b/src/components/script/dom/performance.rs
index fcbd23a2bf2..eeab8ad282c 100644
--- a/src/components/script/dom/performance.rs
+++ b/src/components/script/dom/performance.rs
@@ -19,10 +19,9 @@ pub struct Performance {
 
 impl Performance {
     fn new_inherited(window: &JSRef<Window>) -> Performance {
-        let timing = JS::from_rooted(&PerformanceTiming::new(window).root().root_ref());
         Performance {
             reflector_: Reflector::new(),
-            timing: timing,
+            timing: JS::from_rooted(&PerformanceTiming::new(window)),
         }
     }