diff --git a/doc/go1.12.html b/doc/go1.12.html
index 2591218eda..3eab22a930 100644
--- a/doc/go1.12.html
+++ b/doc/go1.12.html
@@ -299,6 +299,11 @@ for {
   as the <code>godoc</code> command line used to do.
 </p>
 
+<p><!-- CL 140959 -->
+  <code>go</code> <code>doc</code> also now includes the <code>-src</code> flag,
+  which will show the target's original source code.
+</p>
+
 <h3 id="trace">Trace</h3>
 
 <p><!-- CL 60790 -->