diff --git a/doc/mdb-export.txt b/doc/mdb-export.txt
index 5d99ff8..0bc25a3 100644
--- a/doc/mdb-export.txt
+++ b/doc/mdb-export.txt
@@ -2,7 +2,7 @@ NAME
   mdb-export - Export data in an MDB database table to CSV format.
 
 SYNOPSIS
-  mdb-export [-H] [-d delimiter] [-R row_delim] [[-Q] | [-q quote [-X escape]]] [-I backend] [-D format] database table
+  mdb-export [-H] [-d delimiter] [-R row_delim] [[-Q] | [-q quote [-X escape]]] [-I backend] [-D format] [-N namespace] database table
 
 DESCRIPTION
   mdb-export is a utility program distributed with MDB Tools.