Karl Marx a Misogynist?

I was reading Ill Fares the Land by Tony Judt and was reminded that I wanted to read A Communist Manifesto by Karl Marx and Friedrich Engles for a while now and I have it on my shelf.  And so I put down Ill Fares the Land and started reading A Communist Manifesto

I came across this sentence and found it misogynistic.  "The less the skill and exertion of strength implied in manual labor, in other words, the more industry becomes developed, the more is the labor of men superseded by that of women.  Differences of age and sex have no longer any distinctive social validity for the working class.  All are instruments of labor, more or less expensive to use, according to their age and sex".

Not that I expected Karl Marx to be a feminist activist, but I was surprised to find this sentence nevertheless.