diff --git a/doc/master/valid_seteuid b/doc/master/valid_seteuid
new file mode 100644
index 0000000..3afc0d2
--- /dev/null
+++ b/doc/master/valid_seteuid
@@ -0,0 +1,9 @@
+SYNOPSIS
+	int valid_seteuid(object ob, string newid)
+
+DESCRIPTION
+	Should return 1 if ob is allowed to set its euid to newid.
+	Objects are always allowed to set their euid to 0.
+
+SEE ALSO
+	seteuid(E), uids(C)