The Colombian government and FARC rebels have hailed a deal to compensate those who lost land as a major breakthrough in peace talks.
But the land deal will only be implemented if a full peace agreement can be reached.
Despite the roadblock, US Vice President Joseph Biden, who was visited Colombia on Monday, said that the US government supports the deal.
"We applaud every advance, every advance that get Colombians closer to the peace they so richly deserve," Biden said.
Al Jazeera's Alessandro Rampietti reports from Bogota.