diff --git a/tildes/tildes/lib/database.py b/tildes/tildes/lib/database.py
index fae0253..db1c29c 100644
--- a/tildes/tildes/lib/database.py
+++ b/tildes/tildes/lib/database.py
@@ -179,7 +179,7 @@ class RecurrenceRule(TypeDecorator):
         if value is None:
             return value
 
-        return rrulestr(value)
+        return rrulestr(value) # type: ignore
 
 
 class TagList(TypeDecorator):