WASHINGTON (AP) — The cost of borrowing money to buy a home rose slightly this week, but remains historically low.

Mortgage buyer Freddie Mac says the average rate on 30-year fixed-rate mortgages rose to 3.99 percent, from 3.95 percent last week. This week's rate matches a 5-month high set two weeks ago. A year ago, the 30-year rate averaged 4.12 percent.

The low rates — anything below 4 percent is low by historical standards — are some consolation for home buyers dealing with rising prices amid a shortage of supply.

The rate on 15-year fixed-rate mortgages increased to an average 3.44 percent from 3.38 percent in the prior week. The 15-year rate averaged 3.37 percent a year ago.

The average on five-year adjustable-rate mortgages rose to 3.46 percent from 3.45 percent last week.