diff --git a/doc/go_spec.html b/doc/go_spec.html
index 184b6960f4..6c0dc8bbd5 100644
--- a/doc/go_spec.html
+++ b/doc/go_spec.html
@@ -1,6 +1,6 @@
 <!--{
 	"Title": "The Go Programming Language Specification",
-	"Subtitle": "Version of August 14, 2017",
+	"Subtitle": "Version of August 25, 2017",
 	"Path": "/ref/spec"
 }-->
 
@@ -4820,8 +4820,9 @@ in the TypeSwitchGuard.
 </p>
 
 <p>
-The type in a case may be <a href="#Predeclared_identifiers"><code>nil</code></a>;
-that case is used when the expression in the TypeSwitchGuard
+Instead of a type, a case may use the predeclared identifier
+<a href="#Predeclared_identifiers"><code>nil</code></a>;
+that case is selected when the expression in the TypeSwitchGuard
 is a <code>nil</code> interface value.
 There may be at most one <code>nil</code> case.
 </p>