A scheduled Wednesday final committee markup on the House version of the Employment Non-Discrimination Act (ENDA) has been postponed.

An Education & Labor Committee spokesperson said lawmakers are working on “legal and technical” issues. The spokesperson said the markup is still expected to take place before the end of the year.

ENDA would outlaw employment discrimination on the basis of sexual orientation and gender identity.

A final markup committee meeting usually signals a majority of members are prepared to send the legislation to the House floor for a final vote.

The legislation is easily expected to win approval in the House, but support in the Senate, where Democrats hold a slim majority, remains shaky.