diff --git a/lib/puma/detect.rb b/lib/puma/detect.rb
index 3dc4c06d..c6b8ed88 100644
--- a/lib/puma/detect.rb
+++ b/lib/puma/detect.rb
@@ -14,6 +14,6 @@ module Puma
   end
 
   def self.mri?
-    RUBY_ENGINE == 'ruby' || RUBY_ENGINE.nil? 
+    RUBY_ENGINE == 'ruby' || RUBY_ENGINE.nil?
   end
 end