diff --git a/doc/go1.9.html b/doc/go1.9.html
index 7cee379c45..3f8d20760e 100644
--- a/doc/go1.9.html
+++ b/doc/go1.9.html
@@ -490,7 +490,7 @@ version of gccgo.
 
     <p><!-- CL 36696 -->
 
-    If any SAN extension, including with no DSN names, is present
+    If any SAN extension, including with no DNS names, is present
     in the certificate, then the Common Name from
     <a href="/pkg/crypto/x509/#Certificate.Subject"><code>Subject</code></a> is ignored.
     In previous releases, the code tested only whether DNS-name SANs were