PRISTINA, Kosovo—Kosovo's Constitutional Court says President Atifete Jahjaga should serve a full 5-year term and not 9 months as agreed to in a political deal that paved the way for her candidacy.

The court said in a decision made public on Friday that the early termination of Jahjaga's mandate is incompatible with the country's top legal document.

The same court ruled in 2011 businessman Begjet Pacolli's election as president breached the constitution because an opposition boycott left fewer lawmakers in parliament for the vote than was required by law.

Pacolli stepped down and Jahjaga, the first woman to serve as president, was named a compromise candidate to avoid a political crisis.

Kosovo declared independence from Serbia in 2008.