Amazon’s decision to raise workers’ minimum wage to $15 per hour was welcome news, even Sen. Bernie Sanders praised the move.

But for some Amazon employees, the excitement didn’t last very long as they learned that existing financial incentives and bonus programs, including stock and monthly bonuses, that usually boost paychecks will be eliminated starting November 1.

Several Amazon warehouse workers in the U.S., who spoke to Yahoo Finance on the condition of anonymity fearing reprisals, talked about how the change will negatively affect them. After the removal of these perks, some workers said they will be making less. Most of the workers who voiced concerns have been working for the company for more than two years, and have been earning close to $15 an hour before the raise.

While these workers’ hourly rates will rise modestly, they said they could lose thousands of dollars that they would have collected from the stock and monthly-bonus programs. Amazon said those who are already making $15 an hour will see an increase in pay but did not specify how much.

An employee earning $15.25 an hour who has worked for Amazon for more than three years in Arizona crunched the numbers. Although he is getting a $1 an hour raise, which would equate to as much as $2,080 in additional pay a year, he said he could have earned a few thousands of dollars more from the incentive programs. “Amazon isn’t giving its employees a raise, they’re taking money from us,” he told Yahoo Finance. “It only looks good if folks don’t know the truth.”

An Amazon spokesperson said “all hourly operations and customer service employees will see an increase in their total compensation as a result of this announcement. In addition, because it’s no longer incentive-based, the compensation will be more immediate and predictable.”

In the past, Amazon had used stock options as a major selling point during the recruiting process. “One of the ways we foster ownership among employees is through Restricted Stock Unit (RSU) awards. RSUs are a key part of our global compensation program, which has been carefully designed to help us attract, motivate and retain employees of the highest caliber,” according to an Amazon brochure about the program.

Under RSUs, full-time warehouse workers usually receive two or three shares each year after a two-year vesting period. Amazon stock (AMZN) has been on a bull run — the share price has more than tripled since 2016 and now is around $2,000. Amazon said it’ll replace RSU with a “direct stock purchase plan” but didn’t offer any specifics.