diff --git a/plugins/unifying/lu-device-bootloader.h b/plugins/unifying/lu-device-bootloader.h
index d2e448bc0..25ff297e0 100644
--- a/plugins/unifying/lu-device-bootloader.h
+++ b/plugins/unifying/lu-device-bootloader.h
@@ -34,11 +34,6 @@ G_DECLARE_DERIVABLE_TYPE (LuDeviceBootloader, lu_device_bootloader, LU, DEVICE_B
 struct _LuDeviceBootloaderClass
 {
 	LuDeviceClass	parent_class;
-	gboolean	 (*write_firmware)		(LuDevice		*device,
-							 GBytes			*fw,
-							 GFileProgressCallback	 progress_cb,
-							 gpointer		 progress_data,
-							 GError			**error);
 };
 
 typedef enum {