diff --git a/fsspec/implementations/http.py b/fsspec/implementations/http.py
index a64942e22..36164864c 100644
--- a/fsspec/implementations/http.py
+++ b/fsspec/implementations/http.py
@@ -274,11 +274,11 @@ async def gen_chunks():
                 else:
                     callback.set_size(getattr(f, "size", None))
 
-                chunk = f.read(64 * 1024)
+                chunk = f.read(chunk_size)
                 while chunk:
                     yield chunk
                     callback.relative_update(len(chunk))
-                    chunk = f.read(64 * 1024)
+                    chunk = f.read(chunk_size)
 
         kw = self.kwargs.copy()
         kw.update(kwargs)