The board of Hewitt Associates Inc. (NYSE:HEW) has received approval from shareholders to accept an acquisition offer from Aon Corp. (NYSE:AON).

Aon, Chicago, an insurance broker with a large consulting arm, announced plans in July to acquire Hewitt, Lincolnshire, Ill., a human resources consulting and benefits administration firm, for about $4.9 billion in cash and stock.

Hewitt stockholders approved the deal today at a special meeting, Hewitt says.

“Completion of the transaction remains subject to customary closing conditions, including the approval of Aon’s stockholders and receipt of certain regulatory approvals (including certain approvals by foreign governmental entities),” Hewitt says.