diff --git a/library/ZendAfi/View/Helper/TagPreview.php b/library/ZendAfi/View/Helper/TagPreview.php
index 74276dea4cc03da56b459b0cfb8b0d5929e4b3b9..e734f6fcd55868b1709eb1ebe9d2b3e8b9270d7e 100644
--- a/library/ZendAfi/View/Helper/TagPreview.php
+++ b/library/ZendAfi/View/Helper/TagPreview.php
@@ -21,7 +21,7 @@
 class ZendAfi_View_Helper_TagPreview extends ZendAfi_View_Helper_BaseHelper {
 	public function tagPreview($url, $libelle) {
 		return 					
-			'<a data-prettyphoto="true" href="'.$url.'?'.http_build_query(['iframe' => 'true', 'width' => '95%', 'height' => '95%']).'" title="'.$libelle.'">
+			'<a data-prettyphoto="true" href="'.$url.'?'.http_build_query(['iframe' => 'true', 'width' => '95%', 'height' => '95%'], '', '&amp;').'" title="'.$libelle.'">
 					<img
 					   src="'.URL_ADMIN_IMG.'picto/show.gif" 
 					   title="'.$libelle.'"
diff --git a/library/startup.php b/library/startup.php
index 7c483154496f57b51f8bb17aab2fa00ff1e58972..62a05ef621f2aa4b2794e2d529eb8ca13d6e0f88 100644
--- a/library/startup.php
+++ b/library/startup.php
@@ -26,8 +26,6 @@ if (!function_exists('xdebug_break')) {
 
 
 function setupOpac() {
-	ini_set('arg_separator.output', '&amp;');
-
 	Zend_Loader::registerAutoload();
 	setupConstants();
 	require_once('requires.php');