diff --git a/libs/core/core.load_resource_plugin.php b/libs/core/core.load_resource_plugin.php
index 4f1b57f8..10ae1eaa 100644
--- a/libs/core/core.load_resource_plugin.php
+++ b/libs/core/core.load_resource_plugin.php
@@ -48,7 +48,7 @@ function smarty_core_load_resource_plugin($params, &$smarty)
          * If the plugin file is found, it -must- provide the properly named
          * plugin functions.
          */
-        $smarty->smarty_include_once($_plugin_file);
+        include_once($_plugin_file);
 
         /*
          * Locate functions that we require the plugin to provide.