Ex-President George H.W. Bush returned to the family compound in Kennebunkport, Maine, Sunday after four days in a Portland hospital. The 41st president fell at his home last week and broke a bone in his neck.

Bush, who at 91 is the nation's oldest living president, fractured his C2 vertebra Wednesday and was treated for four days at Maine Medical Center, according to his spokesman, Jim McGrath, the Los Angeles Times reported. The fractured bone is near the base of the skull.

Bush returned to his home in Kennebunkport wearing a hard neck brace, McGrath said.

Bush's physician, Dr. William D'Angelo, told reporters Thursday he planned to let the bone heal without surgery and he was hopeful Bush would make a full recovery. A statement released Thursday from Bush’s office said: “The president never lost consciousness, and the injury he sustained neither impinged on his spine nor resulted in any neurological deficits.” According to the statement, Bush will not need surgery but will be in a neck brace for “at least a couple of months.”

The former president and his wife, Barbara, recently hosted a fundraiser for their son Jeb's 2016 presidential campaign.

Although he could no longer use his legs, Bush celebrated his 90th birthday by skydiving with the All Veteran Group parachute team near his summer home in Maine. The former president also skydived to celebrate his 75th, 80th and 85th birthdays, according to CNN.