If parsing results in an error, can I make the app exit with non-zero status?

I notice that if I leave out required options, my app shows an error message and help, but still exits with zero (non-error) status.

Is there a way to change this without overriding/re-implementing the help-text? If there's a param error, it should return an error status.

(That honestly seems like an oversight. Am I overlooking an option?)