diff --git a/lib/jekyll/commands/build.rb b/lib/jekyll/commands/build.rb
index 2a7348a7..d5a0e570 100644
--- a/lib/jekyll/commands/build.rb
+++ b/lib/jekyll/commands/build.rb
@@ -62,7 +62,7 @@ module Jekyll
 
       dw.add_observer do |*args|
         t = Time.now.strftime("%Y-%m-%d %H:%M:%S")
-        puts "[#{t} regeneration: #{args.size} files changed"
+        puts "[#{t}] regeneration: #{args.size} files changed"
         site.process
       end