Barcelona have backed the Catalan region's right to vote for independence from Spain.
There have been suggestions from the Spanish Football League (LFP) that Luis Enrique's men will be booted out of La Liga should the Catalan region, of which they are at the heart, become a new country.
Such comments appeared to make the Camp Nou club reluctant to show support for the independence campaign and they were criticised by some fans for refusing to speculate on the "sensitive issue" following a board meeting on Monday.
However, Barca have finally shown their hand ahead of the referendum on November 9, which could lead to a full-scale separation from Spain vote in the near future.
"FC Barcelona have signed the Catalan national pact for self-determination," the club said in a statement on their website. "FC Barcelona formalised their adhesion in a formal letter from president Josep Maria Bartomeu to the pact co-ordinator Joan Rigol.
"The pact brings together over 3,500 organisations and associations from a wide spectre range of social and political positions which endorse the Catalan people's right to self-determination."
Barca defender Gerard Pique was under fire during this latest international break for showing support for Catalan's independence.