diff --git a/lib/jekyll/commands/build.rb b/lib/jekyll/commands/build.rb
index 901806c7..79ab11bb 100644
--- a/lib/jekyll/commands/build.rb
+++ b/lib/jekyll/commands/build.rb
@@ -32,7 +32,6 @@ module Jekyll
       # Returns nothing.
       def self.watch(site, options)
         require 'listen'
-        require 'pathname'
 
         source = options['source']
         destination = Pathname.new(options['destination'])