diff --git a/oc-includes/osclass/helpers/hSearch.php b/oc-includes/osclass/helpers/hSearch.php
index 3b6a7fa906..7812804b31 100755
--- a/oc-includes/osclass/helpers/hSearch.php
+++ b/oc-includes/osclass/helpers/hSearch.php
@@ -335,7 +335,7 @@ function osc_search_show_all_url($params = array()) {
      * @params array $params
      * @return string
      */
-    function osc_search_url($params = null) {
+    function osc_search_url($params = array()) {
         if(is_array($params)) {
             osc_prune_array($params);
         }