diff --git a/netwerk/streamconv/converters/nsUnknownDecoder.cpp b/netwerk/streamconv/converters/nsUnknownDecoder.cpp
index 5fe9bba442..d4aa09f2b9 100644
--- a/netwerk/streamconv/converters/nsUnknownDecoder.cpp
+++ b/netwerk/streamconv/converters/nsUnknownDecoder.cpp
@@ -562,6 +562,8 @@ bool nsUnknownDecoder::SniffForXML(nsIRequest* aRequest)
 
 bool nsUnknownDecoder::SniffURI(nsIRequest* aRequest)
 {
+  nsCOMPtr<nsIChannel> channel(do_QueryInterface(aRequest));
+  nsCOMPtr<nsILoadInfo> loadInfo = channel->GetLoadInfo();
   nsCOMPtr<nsIMIMEService> mimeService(do_GetService("@mozilla.org/mime;1"));
   if (mimeService) {
     nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);