apt-get upgrade throws libpam-systemd dependency error

I have been googling the error shown below, attempting fixes, and chasing my tail for a couple of hours now. apt-get -f install generates errors as well, so that's not the one true fix. What do you recommend I try next?

$ sudo apt-get upgrade
Reading package lists… Done
Building dependency tree
Reading state information… Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
libpam-systemd : Depends: systemd-sysv but it is not installed
E: Unmet dependencies. Try using -f.