diff --git a/include/ac_common.php b/include/ac_common.php
index a03fafda8..fea039ebb 100644
--- a/include/ac_common.php
+++ b/include/ac_common.php
@@ -314,7 +314,7 @@ function html_page_start($p_theme="", $p_script="", $p_script2="")
     echo "<BODY $p_script>";
     echo '<div id="info_div"></div>';
     echo '<div id="error_div">'.
-            HtmlInput::title_box("Erreur", 'error_div','hide').
+            HtmlInput::title_box(_("Erreur"), 'error_div','hide').
             '<div id="error_content_div">'.
             '</div>'.
             '<p style="text-align:center">'.
