diff --git a/telethon/client/telegrambaseclient.py b/telethon/client/telegrambaseclient.py
index 4c3b567c..370f228d 100644
--- a/telethon/client/telegrambaseclient.py
+++ b/telethon/client/telegrambaseclient.py
@@ -320,9 +320,6 @@ class TelegramBaseClient(abc.ABC):
         self.api_id = int(api_id)
         self.api_hash = api_hash
 
-        if inspect.iscoroutinefunction(self.session.process_entities):
-            self._log[__name__].warning('Using async sessions support is an experimental feature')
-
         # Current proxy implementation requires `sock_connect`, and some
         # event loops lack this method. If the current loop is missing it,
         # bail out early and suggest an alternative.
diff --git a/telethon/utils.py b/telethon/utils.py
index d4553b6d..74f7988e 100644
--- a/telethon/utils.py
+++ b/telethon/utils.py
@@ -14,6 +14,7 @@ import os
 import pathlib
 import re
 import struct
+import warnings
 from collections import namedtuple
 from mimetypes import guess_extension
 from types import GeneratorType
@@ -1562,5 +1563,6 @@ def _photo_size_byte_count(size):
 async def maybe_async(coro):
     result = coro
     if inspect.isawaitable(result):
+        warnings.warn('Using async sessions support is an experimental feature')
         result = await result
     return result