How do I use reflect to check if the type of a struct field is interface{}?

I am using the reflect package to determine the type of a struct field is interface{}

I want to do the comparison like so (where t is a reflect.Type):

if  t == reflect.TypeOf(interface{}) {

}

The problem is that the compiler complains: type interface {} is not an expression.

Is there anyway to check if the type of a struct field is an interface{}?