diff --git a/telethon/client/telegrambaseclient.py b/telethon/client/telegrambaseclient.py
index dd127654..48c6c9a4 100644
--- a/telethon/client/telegrambaseclient.py
+++ b/telethon/client/telegrambaseclient.py
@@ -7,6 +7,7 @@ import platform
 import time
 import typing
 import datetime
+import pathlib
 
 from .. import version, helpers, __name__ as __base_name__
 from ..crypto import rsa
@@ -235,7 +236,7 @@ class TelegramBaseClient(abc.ABC):
 
     def __init__(
             self: 'TelegramClient',
-            session: 'typing.Union[str, Session]',
+            session: 'typing.Union[str, pathlib.Path, Session]',
             api_id: int,
             api_hash: str,
             *,
@@ -284,9 +285,9 @@ class TelegramBaseClient(abc.ABC):
         self._log = _Loggers()
 
         # Determine what session object we have
-        if isinstance(session, str) or session is None:
+        if isinstance(session, (str, pathlib.Path)) or session is None:
             try:
-                session = SQLiteSession(session)
+                session = SQLiteSession(str(session))
             except ImportError:
                 import warnings
                 warnings.warn(