Get an Int Returns Bad Any Cast

[ChainofChaos]

Not sure what's wrong with this both argument and default_value are an integer but it still gets bad any cast error.
Command line argument
test -T 3
Code

program.add_argument("-T", "--threads")
	.default_value(6)
	.help("specify how many threads you want to use");
unsigned int threads = program.get<int>("-T");  //Bad any cast

[ChainofChaos]

My bad didn't read this #65 should have been use scan

program.add_argument("-T", "--threads")
        .scan<'d', int>()
	.default_value(6)
	.help("specify how many threads you want to use");