SKOPJE, North Macedonia — German President Frank-Walter Steinmeier has urged North Macedonia to acknowledge the presence of an ethnic Bulgarian minority in the country, amid other actions required to speed up its European Union accession process.

Steinmeier arrived in the the capital, Skopje, Tuesday on a two-day official visit, and will then proceed to neighboring Albania.

Both Balkan countries started membership talks with the EU in July, in a process expected to last years. North Macedonia’s accession bid is being held up by a dispute with neighboring EU member Bulgaria, which can block EU expansion — a process that requires unanimous approval by member states.

The dispute focuses on history and cultural heritage. To solve it, North Macedonia has undertaken to amend its constitution to acknowledge the existence of an ethnic Bulgarian minority. But it’s unclear whether the leftist government will be able to secure the required enhanced majority in Parliament for the amendment.

Steinmeier said the constitutional amendment was “an important decision” for North Macedonia as it would ensure progress in the EU talks. “At the same time, it becomes important for North Macedonia to continue with its internal reform process,” he said at joint press conference with North Macedonia’s President Stevo Pendarovski.

Pendarovski noted that his country has been preparing for the negotiations with the EU for 17 years.

“That is the longest period of preparation of any country in the history of the European Union and we are the best-prepared candidate for membership in the history of that organization,” he said.

Before the disagreement with Bulgaria emerged, Skopje settled another dispute with southern neighbor Greece that was also threatening to derail its EU candidacy.

During his visit to North Macedonia, Steinmeier will address Parliament and meet with Prime Minister Dimitar Kovachevski. He will also visit two large German investments on Wednesday — a wind park in the southern town of Bogdanci and a factory in the central town of Kavadarci.

Germany has been North Macedonia’s biggest trading partner for years, absorbing nearly half the country’s exports. About 200 German-controlled companies employ some 15,000 people in North Macedonia.