The striker struck four minutes before the break and scored his fourth goal of the season.
It was Real Madrid's sixth victory in the last seven matches in the Spanish top league.
The team most recently came from a 0-1 loss in the derby at home against Atlético this weekend.
Kosovar Asllani was missing from Real Madrid's squad.
"Las Blancas" is second in the limping table after 13 games played, two points behind Barcelona who have three games less in the account.
Huelva is in 15th place.