libreadline.so.5: No such file or directory

I just tried running a program installed through a .deb package and get this error:

error while loading shared libraries: libreadline.so.5: cannot open shared object file: No such file or directory

Does anyone know which library or package libreadline is a part of? If so, how do I install and make sure it is version 5?

Thanks!

Solution 1:

There is a package libreadline5 in lenny: http://packages.debian.org/lenny/libreadline5