diff --git a/doc/go_spec.html b/doc/go_spec.html
index 1d0ea22..6e07c94 100644
--- a/doc/go_spec.html
+++ b/doc/go_spec.html
@@ -1,6 +1,6 @@
 <!--{
 	"Title": "The Go Programming Language Specification",
-	"Subtitle": "Version of September 1, 2016",
+	"Subtitle": "Version of October 4, 2016",
 	"Path": "/ref/spec"
 }-->
 
@@ -3837,10 +3837,12 @@
 	to <code>T</code>.
 	</li>
 	<li>
-	<code>x</code>'s type and <code>T</code> have identical
+	ignoring struct tags (see below),
+	<code>x</code>'s type and <code>T</code> have <a href="#Type_identity">identical</a>
 	<a href="#Types">underlying types</a>.
 	</li>
 	<li>
+	ignoring struct tags (see below),
 	<code>x</code>'s type and <code>T</code> are unnamed pointer types
 	and their pointer base types have identical underlying types.
 	</li>
@@ -3861,6 +3863,31 @@
 </ul>
 
 <p>
+<a href="#Struct_types">Struct tags</a> are ignored when comparing struct types
+for identity for the purpose of conversion:
+</p>
+
+<pre>
+type Person struct {
+	Name    string
+	Address *struct {
+		Street string
+		City   string
+	}
+}
+
+var data *struct {
+	Name    string `json:"name"`
+	Address *struct {
+		Street string `json:"street"`
+		City   string `json:"city"`
+	} `json:"address"`
+}
+
+var person = (*Person)(data)  // ignoring tags, the underlying types are identical
+</pre>
+
+<p>
 Specific rules apply to (non-constant) conversions between numeric types or
 to and from a string type.
 These conversions may change the representation of <code>x</code>