diff --git a/lib/src/jwt.dart b/lib/src/jwt.dart
index 81ac71a..d666371 100644
--- a/lib/src/jwt.dart
+++ b/lib/src/jwt.dart
@@ -94,7 +94,7 @@ class JWT {
 
         // aud
         if (audience != null) {
-          if (!payload.containsKey('aud')) {
+          if (payload.containsKey('aud')) {
             if (payload['aud'] is String && payload['aud'] != audience.first) {
               throw JWTInvalidError('invalid audience');
             } else if (payload['aud'] is List &&
@@ -102,6 +102,9 @@ class JWT {
               throw JWTInvalidError('invalid audience');
             }
           }
+          else{
+            throw JWTInvalidError('invalid audience');
+          }
         }
 
         // sub