diff --git a/lib/jekyll/commands/build.rb b/lib/jekyll/commands/build.rb
index 3e0b715e..64ae6e05 100644
--- a/lib/jekyll/commands/build.rb
+++ b/lib/jekyll/commands/build.rb
@@ -85,16 +85,7 @@ module Jekyll
           end
 
           External.require_with_graceful_fail "jekyll-watch"
-          watch_method = Jekyll::Watcher.method(:watch)
-          if watch_method.parameters.size == 1
-            watch_method.call(
-              options
-            )
-          else
-            watch_method.call(
-              options, site
-            )
-          end
+          Jekyll::Watcher.watch(options, site)
         end
       end
     end