diff --git a/libs/core/core.write_compiled_include.php b/libs/core/core.write_compiled_include.php
index df963bf1..2b530aa0 100644
--- a/libs/core/core.write_compiled_include.php
+++ b/libs/core/core.write_compiled_include.php
@@ -30,7 +30,7 @@ function smarty_core_write_compiled_include($params, &$smarty)
 
     $_compile_path = $params['include_file_path'];
 
-    $smarty->_cache_serials[$_compile_path] = $smarty->params['cache_serial'];
+    $smarty->_cache_serials[$_compile_path] = $params['cache_serial'];
     $_include_compiled .= "\$this->_cache_serials['".$_compile_path."'] = '".$params['cache_serial']."';\n\n?>";
 
     $_include_compiled .= $params['plugins_code'];