diff --git a/claims.go b/claims.go
index 4430c84..b4560f8 100644
--- a/claims.go
+++ b/claims.go
@@ -12,4 +12,5 @@ type Claims interface {
 	GetNotBefore() *NumericDate
 	GetIssuer() string
 	GetAudience() ClaimStrings
+	Valid() bool
 }