The S&P Global US manufacturing index for August was revised higher to 53.9 from the flash reading of 53.2, compared with expectations for a smaller upward revision to 53.4 in a survey compiled by Bloomberg as of 7:40 am ET.
The index is the same as in July, indicating expansion.
S&P Global noted slower growth of demand and output, but stock building efforts continued.
The ISM's manufacturing reading for August is due to be released at 10:00 am ET.