Commands class uses | instead of ,

I am using Asterisk 1.6 with adhearsion. In Asterisk 1.6 the '|' was replaced by a ',' to seperate parameters on Asterisk actions like Dial(). This causes the commands not to be executed.
I fixed this with the following workaround:

def execute(application, *arguments)
result = raw_response("EXEC #{application} #{arguments * '|'}") return false if error?(result) result end

is changed to

def execute(application, *arguments)
result = raw_response("EXEC #{application} #{arguments * ','}") return false if error?(result) result end