diff --git a/netwerk/protocol/http/HttpChannelChild.h b/netwerk/protocol/http/HttpChannelChild.h
index 075ddb29c472..8e08e9581beb 100644
--- a/netwerk/protocol/http/HttpChannelChild.h
+++ b/netwerk/protocol/http/HttpChannelChild.h
@@ -183,7 +183,6 @@ private:
   nsCOMPtr<nsIChildChannel> mRedirectChannelChild;
   RefPtr<InterceptStreamListener> mInterceptListener;
   RefPtr<nsInputStreamPump> mSynthesizedResponsePump;
-  nsAutoPtr<nsHttpResponseHead> mSynthesizedResponseHead;
   nsCOMPtr<nsIInputStream> mSynthesizedInput;
   int64_t mSynthesizedStreamLength;