An 18-year-old man has been charged with murder over the fatal stabbing of a teenager in Melbourne's north-west.

Maaka Hakiwai, 17, died in hospital after an incident in which he and his brother Nate, 18, were stabbed in Kings Park on Main Road West on the afternoon of September 28.

Ten days after the stabbing, a Sydenham man was charged with murder, armed robbery and intentionally cause serious injury on Tuesday night. He will appear at the Melbourne Magistrates Court on Wednesday.

Brothers Nate and Maaka Hakiwai.

Nate, the eldest of four children, was seriously injured in the attack.