AUSTIN, Texas — Mark Zuckerberg, Tim Cook and the CEOs of 12 other prominent tech companies have called on Texas Governor Greg Abbott to drop pending “discriminatory legislation.”

Abbott said he will announce this week if he plans to call a special session and what he wants them to address. It would be the first for Abbott, who took office in 2015.

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Rumored to be at the top of that session’s list — the so-called “bathroom bill” that would affect transgender students.

The letter is dated May 27 and addressed to Gov. Abbott says the “passage of any discriminatory legislation” in Texas would be “bad for our employees and bad for business.”

Reported intially by The Dallas Morning News, the letter has signatures from Amazon CEO Jeff Wilke, IBM Chairman Ginni Rometty, Microsoft Corp. President Brad Smith and Google CEO Sundar Pichai.

Additional signatures came from leaders of Dell Technologies, Hewlett Packard Enterprise, Cisco, Silicon Labs, Celanese Corp., GSD&M, Salesforce and Gearbox Software.