diff --git a/docs/en/programmers/advanced-features/advanced-features-prefilters.xml b/docs/en/programmers/advanced-features/advanced-features-prefilters.xml
index 4ec9ff03..168840cc 100644
--- a/docs/en/programmers/advanced-features/advanced-features-prefilters.xml
+++ b/docs/en/programmers/advanced-features/advanced-features-prefilters.xml
@@ -46,7 +46,7 @@ $smarty->display('index.tpl');
  <para>See also <link linkend="api.register.prefilter">register_prefilter()</link>,
  <link linkend="advanced.features.postfilters">postfilters</link>
  and
- <link linkend="api.load.filter">load_filter()</link>
+ <link linkend="api.load.filter">load_filter()</link>.
  </para>
 </sect1>
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