diff --git a/drivers/staging/greybus/greybus.h b/drivers/staging/greybus/greybus.h
index eb5eb6080783..41be5792443c 100644
--- a/drivers/staging/greybus/greybus.h
+++ b/drivers/staging/greybus/greybus.h
@@ -142,11 +142,6 @@ struct gbuf {
  * of the "main" gb_module structure.
  */
 
-struct gb_i2c_device;
-struct gb_gpio_device;
-struct gb_tty;
-struct gb_usb_device;
-struct gb_battery;
 struct greybus_host_device;
 struct svc_msg;