diff --git a/tests/test-thread-pool.c b/tests/test-thread-pool.c
index c1f8e13a9f..aa156bcd32 100644
--- a/tests/test-thread-pool.c
+++ b/tests/test-thread-pool.c
@@ -180,7 +180,7 @@ static void test_cancel(void)
 
     /* Canceling the others will be a blocking operation.  */
     for (i = 0; i < 100; i++) {
-        if (data[i].n != 3) {
+        if (data[i].aiocb && data[i].n != 3) {
             bdrv_aio_cancel(data[i].aiocb);
         }
     }
diff --git a/thread-pool.c b/thread-pool.c
index fbdd3ffa3a..dfb699dd94 100644
--- a/thread-pool.c
+++ b/thread-pool.c
@@ -224,6 +224,7 @@ static void thread_pool_cancel(BlockDriverAIOCB *acb)
         pool->pending_cancellations--;
     }
     qemu_mutex_unlock(&pool->lock);
+    event_notifier_ready(&pool->notifier);
 }
 
 static const AIOCBInfo thread_pool_aiocb_info = {