diff --git a/doc/go1.html b/doc/go1.html
index 4191c4b..e3d2354 100644
--- a/doc/go1.html
+++ b/doc/go1.html
@@ -1146,11 +1146,17 @@
 </ul>
 
 <p>
-Also, the <code>Request.RawURL</code> field has been removed; it was a
+The <code>Request.RawURL</code> field has been removed; it was a
 historical artifact.
 </p>
 
 <p>
+The <code>Handle</code> and <code>HandleFunc</code>
+functions, and the similarly-named methods of <code>ServeMux</code>,
+now panic if an attempt is made to register the same pattern twice.
+</p>
+
+<p>
 <em>Updating</em>:
 Running <code>go fix</code> will update the few programs that are affected except for
 uses of <code>RawURL</code>, which must be fixed by hand.
diff --git a/doc/go1.tmpl b/doc/go1.tmpl
index 819c71e..8f27682 100644
--- a/doc/go1.tmpl
+++ b/doc/go1.tmpl
@@ -1049,11 +1049,17 @@
 </ul>
 
 <p>
-Also, the <code>Request.RawURL</code> field has been removed; it was a
+The <code>Request.RawURL</code> field has been removed; it was a
 historical artifact.
 </p>
 
 <p>
+The <code>Handle</code> and <code>HandleFunc</code>
+functions, and the similarly-named methods of <code>ServeMux</code>,
+now panic if an attempt is made to register the same pattern twice.
+</p>
+
+<p>
 <em>Updating</em>:
 Running <code>go fix</code> will update the few programs that are affected except for
 uses of <code>RawURL</code>, which must be fixed by hand.