diff --git a/apps/news/serializers.py b/apps/news/serializers.py
index db1d8fd5..672334dd 100644
--- a/apps/news/serializers.py
+++ b/apps/news/serializers.py
@@ -161,6 +161,7 @@ class NewsDetailWebSerializer(NewsDetailSerializer):
     should_read = SerializerMethodField()
     agenda = AgendaSerializer()
     banner = NewsBannerSerializer()
+    in_favorites = serializers.BooleanField(read_only=True)
 
     class Meta(NewsDetailSerializer.Meta):
         """Meta class."""
@@ -170,6 +171,7 @@ class NewsDetailWebSerializer(NewsDetailSerializer):
             'should_read',
             'agenda',
             'banner',
+            'in_favorites',
         )
 
     def get_same_theme(self, obj):