diff --git a/twilio/http/async_http_client.py b/twilio/http/async_http_client.py
index ecd5d4de9..50b90d417 100644
--- a/twilio/http/async_http_client.py
+++ b/twilio/http/async_http_client.py
@@ -76,7 +76,9 @@ async def request(
 
         :return: An http response
         """
-        if timeout is not None and timeout <= 0:
+        if timeout is None:
+            timeout = self.timeout
+        elif timeout <= 0:
             raise ValueError(timeout)
 
         basic_auth = None