diff --git a/opensearchpy/_async/http_aiohttp.py b/opensearchpy/_async/http_aiohttp.py
index a3c98c1a5..d5d5a152d 100644
--- a/opensearchpy/_async/http_aiohttp.py
+++ b/opensearchpy/_async/http_aiohttp.py
@@ -29,7 +29,7 @@
 import os
 import ssl
 import warnings
-from typing import Any, Collection, Mapping, Optional, Union
+from typing import Any, Callable, Collection, Mapping, Optional, Union
 
 import urllib3
 
@@ -146,9 +146,14 @@ def __init__(
         )
 
         if http_auth is not None:
-            if isinstance(http_auth, (tuple, list)):
-                http_auth = ":".join(http_auth)
-            self.headers.update(urllib3.make_headers(basic_auth=http_auth))
+            if isinstance(http_auth, Callable):  # type: ignore
+                pass
+            elif isinstance(http_auth, (tuple, list)):
+                self.headers.update(
+                    urllib3.make_headers(basic_auth=":".join(http_auth))
+                )
+            else:
+                self.headers.update(urllib3.make_headers(basic_auth=http_auth))
 
         # if providing an SSL context, raise error if any other SSL related flag is used
         if ssl_context and (
@@ -285,6 +290,9 @@ async def perform_request(
         if headers:
             req_headers.update(headers)
 
+        if isinstance(self._http_auth, Callable):  # type: ignore
+            req_headers.update(self._http_auth(method, str(url), body))
+
         if self.http_compress and body:
             body = self._gzip_compress(body)
             req_headers["content-encoding"] = "gzip"