diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 32ce70f479f..a8bcaefc306 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -1000,6 +1000,8 @@ function GETPOST($paramname, $check = 'alphanohtml', $method = 0, $filter = null
 				$newout = $user->fk_user;
 			} elseif ($reg[1] == 'ENTITY_ID' || $reg[1] == 'ENTITYID') {
 				$newout = $conf->entity;
+			} elseif ($reg[1] == 'ID') {
+				$newout = '__ID__';     // We keep __ID__ we find into backtopage url
 			} else {
 				$newout = ''; // Key not found, we replace with empty string
 			}