diff --git a/poezio_plugins/omemo/__init__.py b/poezio_plugins/omemo/__init__.py
index 7b62291..53ea84a 100644
--- a/poezio_plugins/omemo/__init__.py
+++ b/poezio_plugins/omemo/__init__.py
@@ -152,7 +152,7 @@ class Plugin(E2EEPlugin):
             return None
 
         body = message['body']
-        expect_problems = {}  # type: Optional[Dict[JID, List[int]]]
+        expect_problems = {}  # type: Dict[JID, List[int]]
 
         while True:
             try: