/usr/include/ is in libktpcommoninternalsprivate-dev 0.3.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KTp/
/usr/include/KTp/global-presence.h
/usr/include/KTp/service-availability-checker.h
/usr/include/KTp/Models/
/usr/include/KTp/Models/contact-model-item.h
/usr/include/KTp/Models/tree-node.h
/usr/include/KTp/Models/proxy-tree-node.h
/usr/include/KTp/Models/groups-model.h
/usr/include/KTp/Models/accounts-model-item.h
/usr/include/KTp/Models/accounts-model.h
/usr/include/KTp/Models/accounts-filter-model.h
/usr/include/KTp/Models/groups-model-item.h
/usr/include/KTp/telepathy-handler-application.h
/usr/include/KTp/ktp-export.h
/usr/include/KTp/circular-countdown.h
/usr/include/KTp/text-parser.h
/usr/include/KTp/error-dictionary.h
/usr/include/KTp/wallet-interface.h
/usr/include/KTp/presence.h