diff --git a/app/controllers/projects/boards/issues_controller.rb b/app/controllers/projects/boards/issues_controller.rb
index b5a56d11d32d64903614c358cf6e06aa8240bff0..fbb06c0ffbaa3dea2ca2c3c7cb88e448498e2791 100644
--- a/app/controllers/projects/boards/issues_controller.rb
+++ b/app/controllers/projects/boards/issues_controller.rb
@@ -76,8 +76,11 @@ module Projects
           only: [:iid, :title, :confidential, :due_date],
           include: {
             assignee: { only: [:id, :name, :username], methods: [:avatar_url] },
-            labels:   { only: [:id, :title, :description, :color, :priority], methods: [:text_color] }
-          })
+            labels:   { only: [:id, :title, :description, :color, :priority], methods: [:text_color] },
+            milestone: { only: [:id, :title] }
+          },
+          user: current_user
+        )
       end
     end
   end
diff --git a/app/models/issue.rb b/app/models/issue.rb
index abd58e0454adac3f40326cb62f638deccb737823..897942905204afe646c5baec7fa64cda20c415f9 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -274,4 +274,10 @@ class Issue < ActiveRecord::Base
   def check_for_spam?
     project.public?
   end
+
+  def as_json(options = {})
+    super(options).tap do |json|
+      json[:subscribed] = subscribed?(options[:user]) if options.has_key?(:user)
+    end
+  end
 end
diff --git a/spec/controllers/projects/boards/issues_controller_spec.rb b/spec/controllers/projects/boards/issues_controller_spec.rb
index 0eebb5a46247b2c1a6e0bfc490a3c5408d66d462..75f6e7f54e25dd918add8b4fc32cfa0d1f5d8762 100644
--- a/spec/controllers/projects/boards/issues_controller_spec.rb
+++ b/spec/controllers/projects/boards/issues_controller_spec.rb
@@ -20,9 +20,11 @@ describe Projects::Boards::IssuesController do
     context 'with valid list id' do
       it 'returns issues that have the list label applied' do
         johndoe = create(:user, avatar: fixture_file_upload(File.join(Rails.root, 'spec/fixtures/dk.png')))
+        issue = create(:labeled_issue, project: project, labels: [planning])
         create(:labeled_issue, project: project, labels: [planning])
         create(:labeled_issue, project: project, labels: [development], due_date: Date.tomorrow)
         create(:labeled_issue, project: project, labels: [development], assignee: johndoe)
+        issue.subscribe(johndoe)
 
         list_issues user: user, list_id: list2
 
diff --git a/spec/fixtures/api/schemas/issue.json b/spec/fixtures/api/schemas/issue.json
index 6de6618e475af90bbab645020689e6cb90559f7b..77f2bcee1f348cee55b564c26e651cfb23212331 100644
--- a/spec/fixtures/api/schemas/issue.json
+++ b/spec/fixtures/api/schemas/issue.json
@@ -43,7 +43,8 @@
       "name": { "type": "string" },
       "username": { "type": "string" },
       "avatar_url": { "type": "uri" }
-    }
+    },
+    "subscribed": { "type": ["boolean", "null"] }
   },
   "additionalProperties": false
 }