diff --git a/datasette/app.py b/datasette/app.py
index b2942cd9..09d7d034 100644
--- a/datasette/app.py
+++ b/datasette/app.py
@@ -187,7 +187,6 @@ async def favicon(request, send):
         send,
         str(FAVICON_PATH),
         content_type="image/png",
-        chunk_size=4096,
         headers={"Cache-Control": "max-age=3600, immutable, public"},
     )