diff --git a/tools/perf/trace/beauty/include/uapi/linux/mount.h b/tools/perf/trace/beauty/include/uapi/linux/mount.h
index 7fa67c2031a5..5d3f8c9e3a62 100644
--- a/tools/perf/trace/beauty/include/uapi/linux/mount.h
+++ b/tools/perf/trace/beauty/include/uapi/linux/mount.h
@@ -197,7 +197,7 @@ struct statmount {
  */
 struct mnt_id_req {
 	__u32 size;
-	__u32 spare;
+	__u32 mnt_ns_fd;
 	__u64 mnt_id;
 	__u64 param;
 	__u64 mnt_ns_id;