diff --git a/mozilla/uriloader/prefetch/nsPrefetchService.cpp b/mozilla/uriloader/prefetch/nsPrefetchService.cpp
index a299e987d12..ccd6262db0a 100644
--- a/mozilla/uriloader/prefetch/nsPrefetchService.cpp
+++ b/mozilla/uriloader/prefetch/nsPrefetchService.cpp
@@ -237,6 +237,14 @@ nsPrefetchListener::OnChannelRedirect(nsIChannel *aOldChannel,
         return NS_ERROR_ABORT;
     }
 
+    // HTTP request headers are not automatically forwarded to the new channel.
+    nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aNewChannel);
+    NS_ENSURE_STATE(httpChannel);
+
+    httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"),
+                                  NS_LITERAL_CSTRING("prefetch"), PR_FALSE);
+
+    mService->UpdateCurrentChannel(aNewChannel);
     return NS_OK;
 }
 
diff --git a/mozilla/uriloader/prefetch/nsPrefetchService.h b/mozilla/uriloader/prefetch/nsPrefetchService.h
index 41e54fd9f11..956a3921521 100644
--- a/mozilla/uriloader/prefetch/nsPrefetchService.h
+++ b/mozilla/uriloader/prefetch/nsPrefetchService.h
@@ -73,6 +73,7 @@ public:
 
     nsresult Init();
     void     ProcessNextURI();
+    void     UpdateCurrentChannel(nsIChannel *c) { mCurrentChannel = c; }
 
 private:
     ~nsPrefetchService();