diff --git a/packages/api/src/queueAdapters/bullMQ.ts b/packages/api/src/queueAdapters/bullMQ.ts
index f201ee24..6e21523f 100644
--- a/packages/api/src/queueAdapters/bullMQ.ts
+++ b/packages/api/src/queueAdapters/bullMQ.ts
@@ -14,7 +14,7 @@ export class BullMQAdapter extends BaseAdapter {
   constructor(private queue: Queue, options: Partial<QueueAdapterOptions> = {}) {
     const libName = 'bullmq';
     super(libName, options);
-    if (!(queue.metaValues?.version as string).startsWith(libName)) {
+    if (!(queue instanceof Queue) || !(queue.metaValues?.version as string)?.startsWith(libName)) {
       throw new Error(`You've used the BullMQ adapter with a non-BullMQ queue.`);
     }
   }