Republican presidential candidate Donald Trump said on Wednesday there would “have to be some form of punishment” for women who undergo abortions if the procedure was outlawed, but stressed that he has yet to determine what that punishment should be.

During an exclusively interview with MSNBC, host Chris Matthews pressed Trump to answer, according to Bloomberg.

“There has to be some form of punishment,” Trump said. “For the woman?” Matthews asked. “Yeah,” Trump said, nodding adding that the penalty would have to be determined for women who get abortions, should they be deemed illegal.

When asked what kind of punishment he had in mind, Trump lacked specifics and said that he has “not determined what the punishment would be.”