George Galloway, a controversial member of the British parliament, is suing the country’s National Union of Students for calling him a “rape denier.”

Galloway, a supporter of Wikileaks founder Julian Assange, said in August that though Assange was accused of “sordid” behavior and “bad sexual etiquette,” the allegations did not “constitute rape … as anyone with any sense can possibly recognize it.”

One of Assange’s accusers has said that after she repeatedly refused to have unprotected sex with him, she awoke to find that he was penetrating her vaginally without a condom. The other says that he attempted to pry her legs open so that he could penetrate her while he held her arms down to keep her from reaching for a condom. The courts that considered Assange’s extradition appeals consistently held that these allegations amounted to rape under British law.

A few days ago the National Union of Students voted to ban Galloway from speaking at NUS-sponsored events, saying in a statement that the organization would not “offer a platform to speakers who are rape deniers or apologists, or support events where such individuals speak.”

A BBC article on the lawsuit does not specify what damages or other redress Galloway is seeking.