diff --git a/lib/sinatra/base.rb b/lib/sinatra/base.rb
index d7e2d65ad9..66d4b5276e 100644
--- a/lib/sinatra/base.rb
+++ b/lib/sinatra/base.rb
@@ -1850,7 +1850,6 @@ class << self
     server.unshift 'puma'
     server.unshift 'falcon'   if ruby_engine != 'jruby'
     server.unshift 'mongrel'  if ruby_engine.nil?
-    server.unshift 'thin'     if ruby_engine != 'jruby'
     server.unshift 'trinidad' if ruby_engine == 'jruby'
 
     set :absolute_redirects, true