The European Union took the unusual step of imposing interim measures on semiconductor maker Broadcom Inc. to limit its dominance of the market.

The injunction marks the first time the EU has used such a measure in 18 years and comes at a time when the EU has been increasing its scrutiny of large tech companies. It orders Broadcom to stop putting anti-competitive restrictions on sales agreements with customers to avoid “serious and irreparable” harm to the market.