Got stuck with this error on Fedora 17 while trying to get a project onto Heroku: Error: uninitialized constant Heroku::API (NameError) After some quick back and forth with the Heroku guys I finally got it fixed: $ rvm uninstall 1.9.3 $ rvm reset $ sudo yum reinstall openssl openssl-devel $ rvm install 1.9.3 $ rvm use 1.9.3 —default $ heroku login Hope this helps someone else :)