1 files changed, 2 insertions, 1 deletions
diff --git a/components/script/dom/bindings/trace.rs b/components/script/dom/bindings/trace.rs
index b7d677a5878..bf99123f7ac 100644
--- a/components/script/dom/bindings/trace.rs
+++ b/components/script/dom/bindings/trace.rs
@@ -42,7 +42,7 @@ use hyper::header::Headers;
 use hyper::method::Method;
 use js::jsapi::{JSObject, JSTracer, JS_CallTracer, JSGCTraceKind};
 use js::jsval::JSVal;
-use js::rust::Cx;
+use js::rust::{Cx, rt};
 use layout_interface::{LayoutRPC, LayoutChan};
 use libc;
 use msg::constellation_msg::{PipelineId, SubpageId, WindowSizeData};
@@ -219,6 +219,7 @@ no_jsmanaged_fields!(PropertyDeclarationBlock);
 no_jsmanaged_fields!(SubpageId, WindowSizeData, PipelineId);
 no_jsmanaged_fields!(QuirksMode);
 no_jsmanaged_fields!(Cx);
+no_jsmanaged_fields!(rt);
 no_jsmanaged_fields!(Headers, Method);
 no_jsmanaged_fields!(ConstellationChan);
 no_jsmanaged_fields!(LayoutChan);