diff --git a/reference/filter/filters.xml b/reference/filter/filters.xml
index 5f556a2e91..8f87672f34 100644
--- a/reference/filter/filters.xml
+++ b/reference/filter/filters.xml
@@ -83,8 +83,8 @@
           Validates whether the value is a valid e-mail address.
          </para>
          <para>
-          In general, this validates e-mail addresses against the syntax in
-          RFC 822, with the exceptions that comments and whitespace folding
+          In general, this validates e-mail addresses against the <literal>addr-spec</literal>syntax in
+          <link xlink:href="&url.rfc;822">RFC 822</link>, with the exceptions that comments and whitespace folding
           and dotless domain names
           are not supported.
          </para>