diff --git a/mozilla/netwerk/protocol/file/src/nsFileChannel.cpp b/mozilla/netwerk/protocol/file/src/nsFileChannel.cpp
index 7a11f631e8f..c5a8dc857a3 100644
--- a/mozilla/netwerk/protocol/file/src/nsFileChannel.cpp
+++ b/mozilla/netwerk/protocol/file/src/nsFileChannel.cpp
@@ -263,7 +263,9 @@ public:
             return rv;
         }
         *inStr = str->mInputStream;
+        NS_ADDREF(*inStr);
         *outStr = str;
+        NS_ADDREF(*outStr);
         return NS_OK;
     }