diff --git a/pyrogram/client/methods/decorators/on_callback_query.py b/pyrogram/client/methods/decorators/on_callback_query.py
index 8413515d..a79cbd10 100644
--- a/pyrogram/client/methods/decorators/on_callback_query.py
+++ b/pyrogram/client/methods/decorators/on_callback_query.py
@@ -22,7 +22,7 @@ from ...ext import BaseClient
 
 
 class OnCallbackQuery(BaseClient):
-    def on_callback_query(self, filters=None, group: int = 0):
+    def on_callback_query(self=None, filters=None, group: int = 0):
         """Use this decorator to automatically register a function for handling
         callback queries. This does the same thing as :meth:`add_handler` using the
         :class:`CallbackQueryHandler`.
diff --git a/pyrogram/client/methods/decorators/on_deleted_messages.py b/pyrogram/client/methods/decorators/on_deleted_messages.py
index e4b2bc97..347deaf9 100644
--- a/pyrogram/client/methods/decorators/on_deleted_messages.py
+++ b/pyrogram/client/methods/decorators/on_deleted_messages.py
@@ -22,7 +22,7 @@ from ...ext import BaseClient
 
 
 class OnDeletedMessages(BaseClient):
-    def on_deleted_messages(self, filters=None, group: int = 0):
+    def on_deleted_messages(self=None, filters=None, group: int = 0):
         """Use this decorator to automatically register a function for handling
         deleted messages. This does the same thing as :meth:`add_handler` using the
         :class:`DeletedMessagesHandler`.
diff --git a/pyrogram/client/methods/decorators/on_disconnect.py b/pyrogram/client/methods/decorators/on_disconnect.py
index a639471b..e2288619 100644
--- a/pyrogram/client/methods/decorators/on_disconnect.py
+++ b/pyrogram/client/methods/decorators/on_disconnect.py
@@ -21,7 +21,7 @@ from ...ext import BaseClient
 
 
 class OnDisconnect(BaseClient):
-    def on_disconnect(self):
+    def on_disconnect(self=None):
         """Use this decorator to automatically register a function for handling
         disconnections. This does the same thing as :meth:`add_handler` using the
         :class:`DisconnectHandler`.