diff --git a/src/runtime-rs/crates/hypervisor/src/dragonball/inner_device.rs b/src/runtime-rs/crates/hypervisor/src/dragonball/inner_device.rs
index 85ac7bd19..47f5d635d 100644
--- a/src/runtime-rs/crates/hypervisor/src/dragonball/inner_device.rs
+++ b/src/runtime-rs/crates/hypervisor/src/dragonball/inner_device.rs
@@ -313,7 +313,7 @@ impl DragonballInner {
             sock_path: config.sock_path.clone(),
             tag: config.mount_tag.clone(),
             num_queues: if config.queue_num > 0 {
-                config.queue_size as usize
+                config.queue_num as usize
             } else {
                 DEFAULT_VIRTIO_FS_NUM_QUEUES as usize
             },