diff --git a/source b/source
index 9c7f6f67cf2..6c2e8a59d32 100644
--- a/source
+++ b/source
@@ -40199,7 +40199,7 @@ interface <dfn>HTMLTableColElement</dfn> : <span>HTMLElement</span> {
  <span>HTMLConstructor</span>]
 interface <dfn>HTMLTableSectionElement</dfn> : <span>HTMLElement</span> {
   [SameObject] readonly attribute <span>HTMLCollection</span> <span data-x="dom-tbody-rows">rows</span>;
-  <span>HTMLElement</span> <span data-x="dom-tbody-insertRow">insertRow</span>(optional long index = -1);
+  <span>HTMLTableRowElement</span> <span data-x="dom-tbody-insertRow">insertRow</span>(optional long index = -1);
   [<span>CEReactions</span>] void <span data-x="dom-tbody-deleteRow">deleteRow</span>(long index);
 };</pre>
     <p><span w-nohtml>Uses <code>HTMLTableSectionElement</code>. </span>The