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diff --git a/entries/attr.xml b/entries/attr.xml
index 203c61c8..40c94de1 100644
--- a/entries/attr.xml
+++ b/entries/attr.xml
@@ -147,7 +147,8 @@ The title of the emphasis is:<div></div>
       <argument name="value">
         <type name="String" />
         <type name="Number" />
-        <desc>A value to set for the attribute.</desc>
+        <type name="Null" />
+        <desc>A value to set for the attribute. If <code>null</code>, the specified attribute will be removed (as in <a href="/prx/000/https/patch-diff.githubusercontent.com/removeAttr/"><code>.removeAttr()</code></a>).</desc>
       </argument>
     </signature>
     <signature>
diff --git a/pages/Types.html b/pages/Types.html
index fbf2bf80..4890df38 100644
--- a/pages/Types.html
+++ b/pages/Types.html
@@ -432,6 +432,9 @@ <h2 id="PlainObject"> PlainObject </h2>
   jQuery.isPlainObject( o ); // true
 </code></pre>
 
+<h2 id="Null">Null</h2>
+<p>The <code>null</code> keyword is a JavaScript literal that is commonly used to express the absence of an intentional value.</p>
+
 <h2 id="Date"> Date </h2>
 <p>The Date type is a JavaScript object that represents a single moment in time. Date objects are instantiated using their constructor function, which by default creates an object that represents the current date and time.
 </p>
