"need to a have a sector"

I came across this sentence in International Herald Tribune: "The best cities now understand that you need to a have a sector of your economy that is world class."

What really threw me off is the "a" after the "need to." Why is there an article after an auxiliary phrasal verb "need to"? I mean, grammatically how is it possible? (I believe the sentence has the same meaning even without the article "a," right?)

Thanks in advance!!