diff --git a/nsupdate/templates/base.html b/nsupdate/templates/base.html
index ec2e0f9..3d59ee8 100644
--- a/nsupdate/templates/base.html
+++ b/nsupdate/templates/base.html
@@ -95,7 +95,7 @@
                  | 
                 <a href="{% url 'legal' %}">Legal notice</a>
                 &nbsp;|&nbsp;
-                <a href="http://validator.w3.org/check/referrer">Valid HTML</a>
+                <a href="http://validator.w3.org/check/referer">Valid HTML</a>
                 &nbsp;|&nbsp;
                 <a href="http://jigsaw.w3.org/css-validator/check/referer">Valid CSS</a>
             </p>