diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -442,7 +442,7 @@
 
   const [threadTypeString, threadKey] = pendingThreadIDMatches[1].split('/');
   const threadType =
-    protocols.find(
+    protocols().find(
       p => p.sidebarConfig.pendingSidebarURLPrefix === threadTypeString,
     )?.sidebarConfig.sidebarThreadType ??
     assertThreadType(Number(threadTypeString.replace('type', '')));
diff --git a/lib/shared/threads/protocols/thread-protocols.js b/lib/shared/threads/protocols/thread-protocols.js
--- a/lib/shared/threads/protocols/thread-protocols.js
+++ b/lib/shared/threads/protocols/thread-protocols.js
@@ -2,7 +2,11 @@
 
 import { dmThreadProtocol } from './dm-thread-protocol.js';
 import { keyserverThreadProtocol } from './keyserver-thread-protocol.js';
+import type { ThreadProtocol } from '../thread-spec.js';
 
-const protocols = [dmThreadProtocol, keyserverThreadProtocol];
+const protocols = (): $ReadOnlyArray<ThreadProtocol<any>> => [
+  dmThreadProtocol,
+  keyserverThreadProtocol,
+];
 
 export { protocols };