How to set owner for directory in the %files?

If I have this line in the %files:

%attr(0555, myuser, myuser) /opt/myapp/lib/my.jar

Then my.jar will have myuser as owner, but directory /opt/myapp/lib will be owner by root. I don't want to write

%attr(0555, myuser, myuser) /opt/myapp/lib/

as I don't want all files in /opt/myapp/lib/ to be included.

How can I set owner for /opt/myapp/lib/ directory?

Thanks.