diff --git a/jwt/claims.go b/jwt/claims.go
index d3e125d..3f5e07e 100644
--- a/jwt/claims.go
+++ b/jwt/claims.go
@@ -116,14 +116,14 @@
 	switch t := c.Get("aud").(type) {
 	case string, []string:
 		return t, true
-	case []interface{}:
+	case interface{}, []interface{}:
 		return stringify(t)
 	default:
 		return nil, false
 	}
 }
 
-func stringify(a []interface{}) ([]string, bool) {
+func stringify(a ...interface{}) ([]string, bool) {
 	s := make([]string, len(a))
 	for i := range a {
 		str, ok := a[i].(string)