diff --git a/source b/source
index 1024b55dd73..611d83976cc 100644
--- a/source
+++ b/source
@@ -114370,19 +114370,19 @@ enum <dfn enum>DOMParserSupportedType</dfn> {
       <span>this</span>'s <span data-x="dom-parent">parent</span> before <span>this</span>.</p>
      </dd>
 
-     <dt>If <var>position</var> is an <span>ASCII case-insensitive</span> match for the string "<code data-x="">afterend</code>"</dt>
+     <dt>If <var>position</var> is an <span>ASCII case-insensitive</span> match for the string "<code data-x="">afterbegin</code>"</dt>
      <dd>
       <p><span data-x="concept-node-insert">Insert</span> <var>fragment</var> into
       <span>this</span> before its <span>first child</span>.</p>
      </dd>
 
-     <dt>If <var>position</var> is an <span>ASCII case-insensitive</span> match for the string "<code data-x="">afterbegin</code>"</dt>
+     <dt>If <var>position</var> is an <span>ASCII case-insensitive</span> match for the string "<code data-x="">beforeend</code>"</dt>
      <dd>
       <p><span data-x="concept-node-append">Append</span> <var>fragment</var> to
       <span>this</span>.</p>
      </dd>
 
-     <dt>If <var>position</var> is an <span>ASCII case-insensitive</span> match for the string "<code data-x="">beforeend</code>"</dt>
+     <dt>If <var>position</var> is an <span>ASCII case-insensitive</span> match for the string "<code data-x="">afterend</code>"</dt>
      <dd>
       <p><span data-x="concept-node-insert">Insert</span> <var>fragment</var> into
       <span>this</span>'s <span data-x="dom-parent">parent</span> before <span>this</span>'s