diff --git a/qm.html b/qm.html
index 0257ed2bc..e50587c3e 100644
--- a/qm.html
+++ b/qm.html
@@ -40,6 +40,8 @@ QM is in the description, or the description doesn't yet exist :-).</p>
   <dd>Not so promising, or requiring some effort (eg. a climb) </dd>
   <dt>C</dt>
   <dd>Pretty cruddy, or good but very hard to get to.</dd>
+  <dt>D</dt>
+  <dd>A dig- only possible to continue if loose rocks or soil are removed.</dd>
   <dt>V</dt>
   <dd>An aven which might be climbable, but not adequately assessed</dd>
   <dt>X</dt>