diff --git a/gunicorn/http/wsgi.py b/gunicorn/http/wsgi.py
index 314e00e9..bf4cfd0a 100644
--- a/gunicorn/http/wsgi.py
+++ b/gunicorn/http/wsgi.py
@@ -208,7 +208,7 @@ class Response(object):
             return False
         elif self.req.version <= (1,0):
             return False
-        elif self.status.startswith("304"):
+        elif self.status.startswith("304") or self.status.startswith("204"):
             # Do not use chunked responses when the response is guaranteed to
             # not have a response body.
             return False