diff --git a/source/Reference/filters/item_citation.rst b/source/Reference/filters/item_citation.rst
index e4d6fdd0..64540cf4 100644
--- a/source/Reference/filters/item_citation.rst
+++ b/source/Reference/filters/item_citation.rst
@@ -32,7 +32,7 @@ Examples
     {
         protected $_filters = array('item_citation');
         
-        public filterItemCitation($citation, $args)
+        public function filterItemCitation($citation, $args)
         {
             $citation = "";
             return $citation;