Spain intends to change its incentives rules for renewable energy, the government announced on Friday.
A new regulatory framework will be established that could lessen the support for renewables, including wind power generation.
An industry ministry spokesperson said targets for wind power capacity may be set on a yearly basis under the new framework.
Currently Spain’s target for wind power capacity is 20 gigawatts (GW) by 2012 and 40 GW by 2020.
Reuters reported that at current growth rates, Spain could meet the 20GW target well before 2012.
On Thursday the Spanish government announced the creation of a register for renewable projects that developers must sign to received subsidies.
Reuters quoted an industry representative as saying that the wind power industry was "very worried" about the new level of bureaucracy.
Spain already cut its subsidies for solar by more than half for 2009, a move that has already affected demand in what has been the hottest solar market in recent years.