diff --git a/app/controllers/media_controller.rb b/app/controllers/media_controller.rb
index ee82625a03..42e32ce2ae 100644
--- a/app/controllers/media_controller.rb
+++ b/app/controllers/media_controller.rb
@@ -46,6 +46,6 @@ class MediaController < ApplicationController
   end
 
   def allow_iframing
-    response.headers['X-Frame-Options'] = 'ALLOWALL'
+    response.headers.delete('X-Frame-Options')
   end
 end
diff --git a/app/controllers/statuses_controller.rb b/app/controllers/statuses_controller.rb
index c52170d081..3d1b74489b 100644
--- a/app/controllers/statuses_controller.rb
+++ b/app/controllers/statuses_controller.rb
@@ -48,7 +48,7 @@ class StatusesController < ApplicationController
     return not_found if @status.hidden? || @status.reblog?
 
     expires_in 180, public: true
-    response.headers['X-Frame-Options'] = 'ALLOWALL'
+    response.headers.delete('X-Frame-Options')
 
     render layout: 'embedded'
   end