Broadcom ( BRCM) said a restatement of past financials will add a staggering $2.22 billion to its stock-based compensation expense.

The Irvine, Calif., wireless chipmaker said late Tuesday that it had completed a restatement of past financials to fix accounting errors tied to stock-option irregularities at the company.

The company had said last September it believed the tab from the restatement would amount to at least $1.5 billion. That was up from an earlier estimate of $750 million.

The company said the revised figure results "from revisions to the accounting measurement dates for most stock options granted between June 1998 and May 2003."

Broadcom said no option grant requiring a measurement date revision was awarded to its co-founders, CEOs or board members.

"The review process was extremely thorough, as we said it would be," said CEO Scott A. McGregor. "We are pleased that our SEC periodic filings are now current, and we look forward to putting this matter behind us."

The Securities and Exchange Commission made an informal inquiry into the matter, and the U.S. attorney for the Central District of California joined the probe, Broadcom said in September.