diff --git a/class/video/usbd_video.c b/class/video/usbd_video.c
index da605354..f1813eaf 100644
--- a/class/video/usbd_video.c
+++ b/class/video/usbd_video.c
@@ -23,6 +23,12 @@
 #include "usbd_core.h"
 #include "usbd_video.h"
 
+struct video_entity_info {
+    uint8_t bDescriptorSubtype;
+    uint8_t bEntityId;
+    uint16_t wTerminalType;
+};
+
 struct usbd_video_cfg_priv {
     struct video_probe_and_commit_controls probe;
     struct video_probe_and_commit_controls commit;
@@ -722,20 +728,20 @@ static void video_notify_handler(uint8_t event, void *arg)
     }
 }
 
-void usbd_video_add_interface(usbd_class_t *class, usbd_interface_t *intf)
+void usbd_video_add_interface(usbd_class_t *devclass, usbd_interface_t *intf)
 {
     static usbd_class_t *last_class = NULL;
 
-    if (last_class != class) {
-        last_class = class;
-        usbd_class_register(class);
+    if (last_class != devclass) {
+        last_class = devclass;
+        usbd_class_register(devclass);
     }
 
     intf->class_handler = video_class_request_handler;
     intf->custom_handler = NULL;
     intf->vendor_handler = NULL;
     intf->notify_handler = video_notify_handler;
-    usbd_class_add_interface(class, intf);
+    usbd_class_add_interface(devclass, intf);
 
     if (usbd_video_cfg.vcintf == 0xff) {
         usbd_video_cfg.vcintf = intf->intf_num;
diff --git a/class/video/usbd_video.h b/class/video/usbd_video.h
index 28208ead..b0615cbd 100644
--- a/class/video/usbd_video.h
+++ b/class/video/usbd_video.h
@@ -29,14 +29,14 @@
 extern "C" {
 #endif
 
-void usbd_video_add_interface(usbd_class_t *class, usbd_interface_t *intf);
+void usbd_video_add_interface(usbd_class_t *devclass, usbd_interface_t *intf);
 
 void usbd_video_open(uint8_t intf);
 void usbd_video_close(uint8_t intf);
 void usbd_video_probe_and_commit_controls_init(uint32_t dwFrameInterval, uint32_t dwMaxVideoFrameSize, uint32_t dwMaxPayloadTransferSize);
 uint32_t usbd_video_mjpeg_payload_fill(uint8_t *input, uint32_t input_len, uint8_t *output, uint32_t *out_len);
 void usbd_video_mjpeg_payload_header_toggle(uint8_t *output, uint32_t packets);
-
+void usbd_video_sof_callback(void);
 
 #ifdef __cplusplus
 }