4 files changed, 6 insertions, 5 deletions
diff --git a/slixmpp/xmlstream/handler/base.py b/slixmpp/xmlstream/handler/base.py
index e1edb249..0bae5674 100644
--- a/slixmpp/xmlstream/handler/base.py
+++ b/slixmpp/xmlstream/handler/base.py
@@ -8,8 +8,9 @@ from __future__ import annotations
 
 import weakref
 from weakref import ReferenceType
-from typing import Optional, TYPE_CHECKING
+from typing import Optional, TYPE_CHECKING, Union
 from slixmpp.xmlstream.matcher.base import MatcherBase
+from xml.etree.ElementTree import Element
 
 if TYPE_CHECKING:
     from slixmpp.xmlstream import XMLStream, StanzaBase
diff --git a/slixmpp/xmlstream/handler/callback.py b/slixmpp/xmlstream/handler/callback.py
index 5d792bf9..50dd4c66 100644
--- a/slixmpp/xmlstream/handler/callback.py
+++ b/slixmpp/xmlstream/handler/callback.py
@@ -45,13 +45,13 @@ class Callback(BaseHandler):
     """
     _once: bool
     _instream: bool
-    _pointer: Callable[[StanzaBase], Any]
 
     def __init__(self, name: str, matcher: MatcherBase,
                  pointer: Callable[[StanzaBase], Any],
                  once: bool = False, instream: bool = False,
                  stream: Optional[XMLStream] = None):
         BaseHandler.__init__(self, name, matcher, stream)
+        self._pointer: Callable[[StanzaBase], Any] = pointer
         self._pointer = pointer
         self._once = once
         self._instream = instream
diff --git a/slixmpp/xmlstream/handler/coroutine_callback.py b/slixmpp/xmlstream/handler/coroutine_callback.py
index d41cd7ba..524cca54 100644
--- a/slixmpp/xmlstream/handler/coroutine_callback.py
+++ b/slixmpp/xmlstream/handler/coroutine_callback.py
@@ -47,7 +47,6 @@ class CoroutineCallback(BaseHandler):
 
     _once: bool
     _instream: bool
-    _pointer: CoroutineFunction
 
     def __init__(self, name: str, matcher: MatcherBase,
                  pointer: CoroutineFunction, once: bool = False,
@@ -62,7 +61,7 @@ class CoroutineCallback(BaseHandler):
             except Exception as e:
                 stanza.exception(e)
 
-        self._pointer = pointer_wrapper
+        self._pointer: CoroutineFunction = pointer_wrapper
         self._once = once
         self._instream = instream
 
diff --git a/slixmpp/xmlstream/handler/waiter.py b/slixmpp/xmlstream/handler/waiter.py
index 684bd32f..dde49754 100644
--- a/slixmpp/xmlstream/handler/waiter.py
+++ b/slixmpp/xmlstream/handler/waiter.py
@@ -8,7 +8,8 @@ from __future__ import annotations
 
 import logging
 from asyncio import Event, wait_for, TimeoutError
-from typing import Optional, TYPE_CHECKING
+from typing import Optional, TYPE_CHECKING, Union
+from xml.etree.ElementTree import Element
 
 import slixmpp
 from slixmpp.xmlstream.stanzabase import StanzaBase