diff --git a/railties/lib/rails/commands/commands_tasks.rb b/railties/lib/rails/commands/commands_tasks.rb
index f061c2bf74..6cfbc70c51 100644
--- a/railties/lib/rails/commands/commands_tasks.rb
+++ b/railties/lib/rails/commands/commands_tasks.rb
@@ -27,7 +27,7 @@ In addition to those, there are:
 All commands can be run with -h (or --help) for more information.
 EOT
 
-    COMMAND_WHITELIST = %(plugin generate destroy console server dbconsole runner new version help)
+    COMMAND_WHITELIST = %w(plugin generate destroy console server dbconsole runner new version help)
 
     def initialize(argv)
       @argv = argv