diff --git a/lib/kaminari/sinatra.rb b/lib/kaminari/sinatra.rb
index <HASH>..<HASH> 100644
--- a/lib/kaminari/sinatra.rb
+++ b/lib/kaminari/sinatra.rb
@@ -2,4 +2,6 @@ require 'sinatra/base'
 require 'kaminari'
 require 'kaminari/helpers/sinatra_helpers'
 
+ActiveSupport::Deprecation.warn 'Kaminari Sinatra support has been extracted to a separate gem, and will be removed in the next 1.0 release. Please bundle kaminari-sinatra gem.'
+
 Kaminari::Hooks.init
Extract kaminari-sinatra gem, and warn users to use the gemified adapter

The built-in Sinatra support will be removed from this gem in the <I> release