--- a/netwerk/protocol/http/nsHttpTransaction.cpp
+++ b/netwerk/protocol/http/nsHttpTransaction.cpp
@@ -535,17 +535,17 @@ nsHttpTransaction::OnTransportStatus(nsI
 
     // If the timing is enabled, and we are not using a persistent connection
     // then the requestStart timestamp will be null, so we mark the timestamps
     // for domainLookupStart/End and connectStart/End
     // If we are using a persistent connection they will remain null,
     // and the correct value will be returned in nsPerformance.
     if (TimingEnabled() && GetRequestStart().IsNull()) {
         if (status == NS_NET_STATUS_RESOLVING_HOST) {
-            SetDomainLookupStart(TimeStamp::Now());
+            SetDomainLookupStart(TimeStamp::Now(), true);
         } else if (status == NS_NET_STATUS_RESOLVED_HOST) {
             SetDomainLookupEnd(TimeStamp::Now());
         } else if (status == NS_NET_STATUS_CONNECTING_TO) {
             SetConnectStart(TimeStamp::Now());
         } else if (status == NS_NET_STATUS_CONNECTED_TO) {
             SetConnectEnd(TimeStamp::Now());
         }
     }