diff --git a/htdocs/expedition/class/expedition.class.php b/htdocs/expedition/class/expedition.class.php
index eaff6848ad8..bcc6b745980 100644
--- a/htdocs/expedition/class/expedition.class.php
+++ b/htdocs/expedition/class/expedition.class.php
@@ -2295,7 +2295,11 @@ class Expedition extends CommonObject
 			$error ++;
 		}
 
-		return $error;
+		if (!$error) {
+			return 1;
+		} else {
+			return -1;
+		}
 	}
 
 	/**