--- a/server/wallet-backend.in
+++ b/server/wallet-backend.in
@@ -500,6 +500,14 @@
 Check whether an object of type <type> and name <name> already exists.  If
 it does, prints C<yes>; if not, prints C<no>.
 
+=item checksum file|password <name>
+
+Return the checksum for a file or password object.  By default a file
+objects checksum some will be calculated using the perl function
+md5_hex of the Digest::MD5 module.  This behavior can be overriden in
+the wallet configuration file.  See perldoc Wallet::Config for
+complete details.
+
 =item comment <type> <name> [<comment>]
 
 If <comment> is not given, displays the current comment for the object