Correct RESTful call for this resource

Question

I'm currently designing a RESTful interface to an existing infrastructure and I'm struggling with one particular aspect.

We have a collection of users which can be accessed at /users And elements of that collection can be accessed at /users/1 etc

However each user has a list of friends which needs to be able to accessed as well. Would users/1/friends be the restful call to make here? It doesn't qualify to be a collection of it's own since it's relates to only one user.

Any help would be greatly appreciated