diff --git a/obj/tools/MGtool/man.d/xdupdate b/obj/tools/MGtool/man.d/xdupdate
new file mode 100644
index 0000000..b3752b9
--- /dev/null
+++ b/obj/tools/MGtool/man.d/xdupdate
@@ -0,0 +1,8 @@
+SYNOPSIS
+      xdupdate <filename>
+
+DESCRIPTION
+     Update an object including all its inherited objects.
+
+EXAMPLE
+     xdupdate /std/player.c