--- a/spec/Overview-WebCryptoAPI.xml	Thu Feb 13 00:00:00 2014 -0800
+++ b/spec/Overview-WebCryptoAPI.xml	Thu Feb 13 00:00:00 2014 -0800
@@ -5089,7 +5089,7 @@
   <span class="comment">// The length (in bytes) of the key to generate. If unspecified, the
   // recommended length will be used, which is the size of the associated hash function's block
   // size.</span>
-  unsigned long length?
+  unsigned long length;
 };
             </x:codeblock>
           </div>

--- a/spec/Overview.html	Thu Feb 13 00:00:00 2014 -0800
+++ b/spec/Overview.html	Thu Feb 13 00:00:00 2014 -0800
@@ -5062,7 +5062,7 @@
   <span class="comment">// The length (in bytes) of the key to generate. If unspecified, the
   // recommended length will be used, which is the size of the associated hash function's block
   // size.</span>
-  unsigned long length?
+  unsigned long length;
 };
             </code></pre></div></div>
           </div>