diff --git a/zh-cn/device-dev/driver/driver-hdf-message-management.md b/zh-cn/device-dev/driver/driver-hdf-message-management.md
index e4f9046970d8ec4e0dc60abacbfdf4be3010f37a..0475000a493c738fbc677a91cbe9b5b7cba2680d 100644
--- a/zh-cn/device-dev/driver/driver-hdf-message-management.md
+++ b/zh-cn/device-dev/driver/driver-hdf-message-management.md
@@ -158,9 +158,9 @@
    3. 驱动上报事件。
       
        ```
-       int32_t SampleDriverDispatch(struct HdfDeviceObject *device, int cmdCode, struct HdfSBuf *data, struct HdfSBuf *reply)
+       int32_t SampleDriverDispatch(HdfDeviceIoClient *client, int cmdCode, struct HdfSBuf *data, struct HdfSBuf *reply)
        {
            ... // process api call here
-           return HdfDeviceSendEvent(deviceObject, cmdCode, data);
+           return HdfDeviceSendEvent(client->device, cmdCode, data);
        }
        ```