Iran’s leaders have called for “resistance” against the U.S. decision on Monday not to extend waivers given to countries almost six months ago over importing Iranian oil.

“There is no way except resistance,” posted President Hassan Rouhani on his website on Wednesday.

Supreme Leader Ayatollah Ali Khamenei said the regime is “able to export our oil to the extent that we need and when we decide.”

He added that the change won’t “remain without an answer.”

However, Iran did score one victory on Wednesday.

The Trump administration announced that regarding exemptions to sanctions related to Iran’s Islamic Revolutionary Guard Corps, foreign governments and firms that deal with the IRGC would not be banned from entering the United States. The same goes for those who work with the United States in Lebanon and Iraq, where the IRGC has a major presence.

The sanctions directly targeting the IRGC, which were enacted last week, will remain.