diff --git a/include/nuttx/usb/cdcacm.h b/include/nuttx/usb/cdcacm.h
index 13d49179509..724259d5349 100644
--- a/include/nuttx/usb/cdcacm.h
+++ b/include/nuttx/usb/cdcacm.h
@@ -349,7 +349,8 @@ typedef FAR void (*cdcacm_callback_t)(enum cdcacm_event_e event);
 
 #if defined(CONFIG_USBDEV_COMPOSITE) && defined(CONFIG_CDCACM_COMPOSITE)
 struct usbdev_description_s;
-int cdcacm_classobject(int minor, struct usbdev_description_s *devdesc,
+struct usbdevclass_driver_s;
+int cdcacm_classobject(int minor, FAR struct usbdev_description_s *devdesc,
                        FAR struct usbdevclass_driver_s **classdev);
 #endif