diff --git a/docs/how-to-use-and-FAQ/vulkan-notes.md b/docs/how-to-use-and-FAQ/vulkan-notes.md
index 9aebf08676f2..fdd3b367e217 100644
--- a/docs/how-to-use-and-FAQ/vulkan-notes.md
+++ b/docs/how-to-use-and-FAQ/vulkan-notes.md
@@ -106,7 +106,7 @@ cmd.wait();
 
 ## batch inference
 ```cpp
-int max_batch_size = vkdev->info.compute_queue_count;
+int max_batch_size = vkdev->info.compute_queue_count();
 
 ncnn::Mat inputs[1000];
 ncnn::Mat outputs[1000];