How do i make an EFI system Partition

Today, I rebooted my 2009 Macbook Pro and I tried to bootcamp, when it said "The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows." I went to disk utility to see if there was a problem, so I verified the disk. When I verified the disk, it said there was a problem in my partition map and "This disk doesn’t contain an EFI system partition. If you want to start up your computer with this disk or include it in a RAID set, back up your data and partition this disk."