diff --git a/app/controllers/v0/devices_controller.rb b/app/controllers/v0/devices_controller.rb
index b10e9826..02d0818a 100644
--- a/app/controllers/v0/devices_controller.rb
+++ b/app/controllers/v0/devices_controller.rb
@@ -90,7 +90,6 @@ def fresh_world_map
           state: device.state,
           system_tags: device.system_tags,
           user_tags: device.user_tags,
-          added_at: device.created_at,
           updated_at: device.updated_at,
           last_reading_at: (device.last_reading_at.present? ? device.last_reading_at : nil)
         }
diff --git a/app/models/device.rb b/app/models/device.rb
index b9eb8db5..9c94c09a 100644
--- a/app/models/device.rb
+++ b/app/models/device.rb
@@ -211,7 +211,6 @@ def self.for_world_map
           state: device.state,
           system_tags: device.system_tags,
           user_tags: device.user_tags,
-          added_at: device.created_at,
           updated_at: device.updated_at,
           last_reading_at: (device.last_reading_at.present? ? device.last_reading_at : nil)
         }
diff --git a/app/views/v0/users/_user.jbuilder b/app/views/v0/users/_user.jbuilder
index bc4fbe5a..e9eef879 100644
--- a/app/views/v0/users/_user.jbuilder
+++ b/app/views/v0/users/_user.jbuilder
@@ -49,6 +49,5 @@ json.devices user.devices do |device|
   json.state device.state
   json.system_tags device.system_tags
   json.last_reading_at device.last_reading_at
-  json.added_at device.created_at.utc.iso8601
   json.updated_at device.updated_at.utc.iso8601
 end