President Recep Tayyip Erdogan said people detained over coup charges should wear a single outfit, like in Guantanamo.

“When they appear in court, let’s make them appear in one-type uniform like in Guantanamo,” Erdogan said during an Istanbul rally to mark the first anniversary of the July 15, 2016 coup attempt on Saturday.

“I also discussed the issue with our prime minister the other,” Erdogan said signalling that he had already given the order. He reiterated his proposal in Ankara the same day.

Turkey has detained more than 130,000 people while put in pre-trial arrest some 55,000 over alleged ties to the Gülen movement, which the government accuses of masterminding the failed takeover.

Erdogan’s proposal came only a week after one of the suspects on trial for an assassination attempt against Erdoğan on the night of a failed coup was thrown out of the courtroom for wearing a T-shirt bearing the word “hero” because it caused tension between the parties during the hearing.

Justice Minister Bekir Bozdag told media on Saturday prisoners will no longer be allowed to wear clothing that feature anything that can be considered as a “message.”

Meanwhile, a textile manufacturer in Turkey has said he is willing to donate 50,000 orange jumpsuits that he designed for people jailed over Gulen links.

The movement denies involvement.