diff --git a/core/server/models/relations/authors.js b/core/server/models/relations/authors.js
index 9521267c466d..c279ed8f8793 100644
--- a/core/server/models/relations/authors.js
+++ b/core/server/models/relations/authors.js
@@ -315,7 +315,7 @@ module.exports.extendModel = function extendModel(Post, Posts, ghostBookshelf) {
             }
 
             function isCurrentOwner() {
-                return context.user === postModel.related('authors').models[0].id;
+                return postModel.related('authors').models.map(author => author.id).includes(context.user);
             }
 
             if (isContributor && isEdit) {