diff --git a/module/doc/model.php b/module/doc/model.php
index 88958a75be..f65d4b0321 100644
--- a/module/doc/model.php
+++ b/module/doc/model.php
@@ -515,7 +515,7 @@ class docModel extends model
         $this->config->doc->search['params']['lib']['values']     = array(''=>'', $libID => $libs[$libID], 'all' => $this->lang->doclib->all);
 
         /* Get the modules. */
-        $moduleOptionMenu = $this->loadModel('tree')->getOptionMenu($libID . 'doc', $startModuleID = 0);
+        $moduleOptionMenu = $this->loadModel('tree')->getOptionMenu($libID, 'doc', $startModuleID = 0);
         $this->config->doc->search['params']['module']['values'] = $moduleOptionMenu;
 
         $this->loadModel('search')->setSearchParams($this->config->doc->search);