How do I stop IE x64 from telling me to install flash?

How do I stop IE x64 from telling me to install flash?

I use both the x86 and x64 versions of IE and since Adobe still can't get an x64 version of flash released every time I'm on a site that uses flash I get alerted to install it. It's really anoying now after 2-3 years of using a 64bit browser. Is there a way to stop IE from doing this short of installing the non-existant version of flash?