July wasn’t exactly magical for McDonald’s, as the fast-food chain saw global sales plunge, pulled down by weakness in the U.S. and the effects of a food safety scandal in China.

The world’s biggest hamburger chain said global comparable sales, a key measure, decreased 2.5% in July. This is more than double the 1.1% analysts expected sales to drop. Other markets saw sharp declines: McDonald’s reported a 3.2% sales drop in the U.S. and a 7.3% slump in Asia, the Middle East and Africa.

The largest driver of the drop was the recent scandal involving McDonald’s MCD meat supplier in Asia, who was accused of repackaging expired meat and picking meat up off the floor and putting it into circulation.

Shanghai Husi Food Co Ltd, a unit of Illinois-based OSI Group, also provided meat to Yum Brands YUM , which owns KFC and Taco Bell.

The company did say earlier this week that it was expecting the problems in China to lead to decreased sales worldwide for July.