diff --git a/airbrake-ruby.gemspec b/airbrake-ruby.gemspec
index 3d17dd5..ca0ec03 100644
--- a/airbrake-ruby.gemspec
+++ b/airbrake-ruby.gemspec
@@ -28,6 +28,7 @@ DESC
   }
 
   puts "Hello debugging: ${RUBY_VERSION}"
+  puts "Hello debugging: ${RUBY_PLATFORM}"
   if defined?(JRuby)
     puts "Hello debugging: it is true"
     s.add_dependency 'rbtree-jruby', '~> 0.2'