diff --git a/lib/inbox-listeners.js b/lib/inbox-listeners.js
index e7df6b6..cfe95b6 100644
--- a/lib/inbox-listeners.js
+++ b/lib/inbox-listeners.js
@@ -207,10 +207,14 @@ export function registerInboxListeners(inboxChain, options) {
         actorObj?.preferredUsername?.toString() ||
         actorUrl;
 
-      const inReplyTo =
-        object instanceof Note
-          ? (await object.getInReplyTo())?.id?.href
-          : null;
+      let inReplyTo = null;
+      if (object instanceof Note && typeof object.getInReplyTo === "function") {
+        try {
+          inReplyTo = (await object.getInReplyTo())?.id?.href ?? null;
+        } catch {
+          /* remote fetch may fail */
+        }
+      }
 
       // Log replies to our posts (existing behavior for conversations)
       if (inReplyTo) {
diff --git a/package.json b/package.json
index 8506ece..174870c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rmdes/indiekit-endpoint-activitypub",
-  "version": "1.0.11",
+  "version": "1.0.12",
   "description": "ActivityPub federation endpoint for Indiekit via Fedify. Adds full fediverse support: actor, inbox, outbox, followers, following, syndication, and Mastodon migration.",
   "keywords": [
     "indiekit",