diff --git a/htdocs/api/index.php b/htdocs/api/index.php
index c66573e8022..afb0289aa32 100644
--- a/htdocs/api/index.php
+++ b/htdocs/api/index.php
@@ -100,7 +100,7 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/functions2.lib.php';
 
 $url = $_SERVER['PHP_SELF'];
 if (preg_match('/api\/index\.php$/', $url)) {	// sometimes $_SERVER['PHP_SELF'] is 'api\/index\.php' instead of 'api\/index\.php/explorer.php' or 'api\/index\.php/method'
-	$url = $_SERVER['PHP_SELF'].$_SERVER['PATH_INFO'];
+	$url = $_SERVER['PHP_SELF'].(empty($_SERVER['PATH_INFO']) ? $_SERVER['ORIG_PATH_INFO'] : $_SERVER['PATH_INFO']);
 }
 // Fix for some NGINX setups (this should not be required even with NGINX, however setup of NGINX are often mysterious and this may help is such cases)
 if (!empty($conf->global->MAIN_NGINX_FIX)) {