diff --git a/users/models/inbox_message.py b/users/models/inbox_message.py
index 83891f1..5609a77 100644
--- a/users/models/inbox_message.py
+++ b/users/models/inbox_message.py
@@ -26,6 +26,10 @@ class InboxMessageStates(StateGraph):
                 case "block":
                     Block.handle_ap(instance.message)
                 case "announce":
+                    # Ignore Lemmy-specific likes and dislikes for perf reasons
+                    # (we can't parse them anyway)
+                    if instance.message_object_type in ["like", "dislike"]:
+                        return cls.processed
                     PostInteraction.handle_ap(instance.message)
                 case "like":
                     PostInteraction.handle_ap(instance.message)