diff --git a/docs/landscape.html b/docs/landscape.html
index 0b039115d7..a11474ee63 100644
--- a/docs/landscape.html
+++ b/docs/landscape.html
@@ -605,6 +605,8 @@ m5 bit 5 set:
 <tr><td nowrap valign=top><tt>A</tt>&nbsp; </td><td align=center>200</td><td align=left>tubular, steel</td></tr>
 </table></li>
 <li>m4 bit 7 set = on snow or desert</li>
+<li>m4 bit 0 set = track with 'Track'number 0 is reserved by pbs</li>
+<li>m4 bit 1 set = track with 'Track'number 1 is reserved by pbs</li>
 </ul>
 </td></tr>