diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index 1d3b75b3..2ca0b7a6 100644
--- a/libs/Smarty.class.php
+++ b/libs/Smarty.class.php
@@ -1459,7 +1459,7 @@ class Smarty
                 return true;
             } else {
                 // get file source and timestamp
-				$_params = array('resource_name' => $resource_name);
+				$_params = array('resource_name' => $resource_name, 'get_source'=>false);
                 if (!$this->_fetch_resource_info($_params, $this)) {
                     return false;
                 }
diff --git a/libs/core/core.load_plugins.php b/libs/core/core.load_plugins.php
index 6e2a8253..170d2dc5 100644
--- a/libs/core/core.load_plugins.php
+++ b/libs/core/core.load_plugins.php
@@ -69,7 +69,7 @@ function smarty_core_load_plugins($params, &$smarty)
             include_once $_plugin_file;
 
             $_plugin_func = 'smarty_' . $_type . '_' . $_name;
-            if (!$smarty->_plugin_implementation_exists($_plugin_func)) {
+            if (!function_exists($_plugin_func)) {
                 $smarty->_trigger_fatal_error("[plugin] function $_plugin_func() not found in $_plugin_file", $_tpl_file, $_tpl_line, __FILE__, __LINE__);
                 continue;
             }