diff --git a/swift/swift.go b/swift/swift.go
index 3443f31b1..17382a89b 100644
--- a/swift/swift.go
+++ b/swift/swift.go
@@ -66,7 +66,7 @@ func init() {
 			Help: "User domain - optional (v3 auth)",
 		}, {
 			Name: "tenant",
-			Help: "Tenant name - optional",
+			Help: "Tenant name - optional for v1 auth, required otherwise",
 		}, {
 			Name: "tenant_domain",
 			Help: "Tenant domain - optional (v3 auth)",