diff --git a/src/includes/class/class.LStemplate.php b/src/includes/class/class.LStemplate.php
index 68c7e0e5..3ff88eb3 100644
--- a/src/includes/class/class.LStemplate.php
+++ b/src/includes/class/class.LStemplate.php
@@ -123,7 +123,7 @@ class LStemplate extends LSlog_staticLoggerClass {
    * Deprecated templates files
    * @var array<string>
    */
-  private const deprecated_template_files = array (
+  private static $deprecated_template_files = array (
     'accueil.tpl', 'blank.tpl', 'empty.tpl',
     'top.tpl', 'bottom.tpl',
   );
@@ -334,7 +334,7 @@ class LStemplate extends LSlog_staticLoggerClass {
   * @return string The path of the Smarty template file
   **/
   public static function getTemplatePath($template, $with_nocache=false) {
-    if (in_array($template, self :: deprecated_template_files))
+    if (in_array($template, self :: $deprecated_template_files))
       self :: log_fatal(
         getFData(
           _("LStemplate : Request template '%{tpl}' is now deprecated. Please refer to upgrade documentation to adapt your templates."),