Document that the directory for -O must exist

diff --git a/mimedecode.docbook b/mimedecode.docbook
index 897f0bc43dee32d3279e4275f3b2e8b949e2a60e..53a547b41c88cfa9d8f89cbec7b0146195742a1d 100644 (file)
--- a/mimedecode.docbook
+++ b/mimedecode.docbook
@@ -467,8 +467,8 @@
       <term>-O dest_dir</term>
       <listitem>
          <para>
-           Set destination directory for the output files. Default is current
-           directory.
+           Set destination directory for the output files; the directory must
+           exist. Default is current directory.
           </para>
       </listitem>
    </varlistentry>