diff --git a/src/http_seed_connection.cpp b/src/http_seed_connection.cpp
index 3361ed94c..0bca75fc1 100644
--- a/src/http_seed_connection.cpp
+++ b/src/http_seed_connection.cpp
@@ -116,6 +116,8 @@ namespace libtorrent
 		else
 		{
 			int receive_buffer_size = receive_buffer().left() - m_parser.body_start();
+			// TODO: in chunked encoding mode, this assert won't hold
+			// the chunk headers should be subtracted from the receive_buffer_size
 			TORRENT_ASSERT(receive_buffer_size <= t->block_size());
 			ret.bytes_downloaded = t->block_size() - receive_buffer_size;
 		}