Idaho is getting rid of its senior year math requirement.

But Gov. Butch Otter isn’t happy about it.

Otter on Thursday allowed Senate Bill 1266 to become law without his signature. And in a transmittal letter Thursday, Otter hinted that he toyed with a veto.

“I am concerned that this measure could undermine our well-informed focus and significant investment in (science, technology, engineering and math) as a centerpiece of K-Career education in Idaho,” Otter wrote.

Under SB 1266, Idaho students would still need to take six semesters of math in order to graduate. Supporters said their measure is designed to head off an unintended consequence: Since high school students must take a senior math class, they often drop math their junior year, at the same time they should be preparing for college entrance exams.

SB 1266 sailed through both houses, passing the Senate 34-0 and the House 65-1.