diff --git a/docs/TableGenFundamentals.html b/docs/TableGenFundamentals.html
index 2e74352010f..147b5be3c43 100644
--- a/docs/TableGenFundamentals.html
+++ b/docs/TableGenFundamentals.html
@@ -371,8 +371,11 @@ supported include:</p>
   <dd>string value</dd>
 <dt><tt>[{ ... }]</tt></dt>
   <dd>code fragment</dd>
-<dt><tt>[ X, Y, Z ]</tt></dt>
-  <dd>list value.</dd>
+<dt><tt>[ X, Y, Z ]<type></tt></dt>
+  <dd>list value.  <type> is the type of the list 
+element and is usually optional.  In rare cases,
+TableGen is unable to deduce the element type in
+which case the user must specify it explicitly.</dd>
 <dt><tt>{ a, b, c }</tt></dt>
   <dd>initializer for a "bits&lt;3&gt;" value</dd>
 <dt><tt>value</tt></dt>