In his document on marriage and family, Pope Francis calls on Roman Catholics to support families, provided they're not headed by an LGBT couple.

The document, titled The Joy of Love and released Friday, appears to close the door on marriage equality.

“There is a failure to realize that only the exclusive and indissoluble union between a man and a woman has a plenary role to play in society as a stable commitment that bears fruit in new life,” the pope wrote.

“We need to acknowledge the great variety of family situations that can offer a certain stability, but de facto or same-sex unions, for example, may not simply be equated with marriage.”

Elsewhere in the document, Pope Francis quotes from a bishops' report on the family produced over two years: “There are absolutely no grounds for considering homosexual unions to be in any way similar remotely analogous to God's plan for marriage and family.”

But the pope also appears to offer some hope, writing that “Some forms of union radically contract this ideal [of heterosexual marriage], while others realize it in at least a partial and analogous way. The Synod Fathers stated that the Church does not disregard the constructive elements in those situations which do not yet or no longer correspond to her teaching on marriage.”

In a statement given to The Washington Post, Marianne Duddy-Burke, executive director of DignityUSA, a group that advocates for LGBT Catholics, expressed disappointment.

“In this document, Pope Francis has continued the characterization of LGBT people as unable to fully reflect the fullness of God's plan for humanity. We had hope for much more, and many, many people are profoundly disappointed today,” she wrote.

The entire document is available on the Vatican's website.