diff --git a/gunicorn/http/__init__.py b/gunicorn/http/__init__.py
index 7f642738..4a6585a0 100644
--- a/gunicorn/http/__init__.py
+++ b/gunicorn/http/__init__.py
@@ -7,5 +7,4 @@ from gunicorn.http.parser import HttpParser
 from gunicorn.http.request import HttpRequest, RequestError
 from gunicorn.http.response import HttpResponse
 
-def __exported_functionality__():
-    return [HttpParser, HttpRequest, RequestError, HttpResponse]
\ No newline at end of file
+__all__ = [HttpParser, HttpRequest, RequestError, HttpResponse]
\ No newline at end of file