How do you wrap up a BOOL for KVC in Cocoa/Obj-C?

I'm using KVC to iterating through a few views. Having trouble setting BOOL properties:

[self setValue:YES forKeyPath:[NSString stringWithFormat:@"myView%d.userInteractionEnabled", n]];

I get: warning: passing argument 1 of 'setValue:forKeyPath:' makes pointer from integer without a cast.

There is no [NSValue valueWithBool:YES] or similar that I can find.

What to do?