diff --git a/net/http/client.ha b/net/http/client.ha
index 4eac8ab..853c639 100644
--- a/net/http/client.ha
+++ b/net/http/client.ha
@@ -100,6 +100,7 @@ fn request_set_content_length(req: *request, body: io::handle) void = {
 	case let off: io::off =>
 		yield off;
 	case io::error =>
+		header_add(&req.header, "Transfer-Encoding", "chunked");
 		return;
 	};
 	const ln = io::seek(body, 0, io::whence::END)!;