2 files changed, 7 insertions, 2 deletions
diff --git a/components/script/dom/performanceresourcetiming.rs b/components/script/dom/performanceresourcetiming.rs
index 1a3022af1c4..f8fe807b85e 100644
--- a/components/script/dom/performanceresourcetiming.rs
+++ b/components/script/dom/performanceresourcetiming.rs
@@ -116,7 +116,7 @@ impl PerformanceResourceTiming {
             initiator_type: initiator_type,
             next_hop: next_hop,
             worker_start: 0.,
-            redirect_start: 0.,
+            redirect_start: resource_timing.redirect_start as f64,
             redirect_end: 0.,
             fetch_start: resource_timing.fetch_start as f64,
             domain_lookup_start: 0.,
@@ -179,6 +179,11 @@ impl PerformanceResourceTimingMethods for PerformanceResourceTiming {
         Finite::wrap(self.request_start)
     }
 
+    // https://w3c.github.io/resource-timing/#dom-performanceresourcetiming-redirectstart
+    fn RedirectStart(&self) -> DOMHighResTimeStamp {
+        Finite::wrap(self.redirect_start)
+    }
+
     // https://w3c.github.io/resource-timing/#dom-performanceresourcetiming-responsestart
     fn ResponseStart(&self) -> DOMHighResTimeStamp {
         // TODO
diff --git a/components/script/dom/webidls/PerformanceResourceTiming.webidl b/components/script/dom/webidls/PerformanceResourceTiming.webidl
index b63f341b1c9..7e9e394ab6b 100644
--- a/components/script/dom/webidls/PerformanceResourceTiming.webidl
+++ b/components/script/dom/webidls/PerformanceResourceTiming.webidl
@@ -12,7 +12,7 @@ interface PerformanceResourceTiming : PerformanceEntry {
     readonly attribute DOMString           initiatorType;
     readonly attribute DOMString           nextHopProtocol;
     // readonly attribute DOMHighResTimeStamp workerStart;
-    // readonly attribute DOMHighResTimeStamp redirectStart;
+    readonly attribute DOMHighResTimeStamp redirectStart;
     // readonly attribute DOMHighResTimeStamp redirectEnd;
     readonly attribute DOMHighResTimeStamp fetchStart;
     // readonly attribute DOMHighResTimeStamp domainLookupStart;