diff --git a/lib/capybara/server.rb b/lib/capybara/server.rb
index 9f38ee75e..3fdcb1c0b 100644
--- a/lib/capybara/server.rb
+++ b/lib/capybara/server.rb
@@ -68,7 +68,7 @@ def boot
           Capybara.timeout(10) { if responsive? then true else sleep(0.5) and false end }
         end
       end
-    rescue Timeout::Error
+    rescue TimeoutError
       puts "Rack application timed out during boot"
       exit
     else