The government of Colombia and the country's largest rebel group, FARC, have agreed on land reform, after more than six months of peace talks.
Their deal calls for the economic and social development of rural areas and providing land to poor farmers.
Land reform is one of the most contentious issues in the talks on ending five decades of conflict.
This step is the first major advance in six months of peace talks taking place in Cuba.
A joint statement warns that the agreement is "conditioned on reaching an agreement on the totality of the agenda," because the talks are based on the principle that "nothing is agreed upon until everything is agreed upon."
The FARC has been fighting the Colombian government since the 1960s. It is the longest-running insurgency in Latin America.