Issue #6074 has been updated by Koichi Sasada. Category set to core Target version set to 2.0.0 I think there are no reason why comma should be rejected. ---------------------------------------- Feature #6074: Allow alias arguments to have a comma https://bugs.ruby-lang.org/issues/6074 Author: Thomas Sawyer Status: Open Priority: Low Assignee: Category: core Target version: 2.0.0 This is one my biggest pet peeves with Ruby. I am always typing: alias :foo, :bar And getting a damn syntax error. Btw, is there a reason why `alias` is a keyword and not a method? -- http://bugs.ruby-lang.org/