INSTALL(FILES "${CMAKE_BINARY_DIR}/include/${PROJECT_NAME}-setting.pc" DESTINATION ${LIBDIR}/pkgconfig)
INSTALL(FILES "${CMAKE_BINARY_DIR}/include/${PROJECT_NAME}-engine.pc" DESTINATION ${LIBDIR}/pkgconfig)
INSTALL(FILES "${CMAKE_BINARY_DIR}/include/tts.h" DESTINATION ${INCLUDEDIR})
+INSTALL(FILES "${CMAKE_BINARY_DIR}/include/tts_internal.h" DESTINATION ${INCLUDEDIR})
INSTALL(FILES "${CMAKE_BINARY_DIR}/include/tts_setting.h" DESTINATION ${INCLUDEDIR})
INSTALL(FILES "${CMAKE_BINARY_DIR}/include/ttse.h" DESTINATION ${INCLUDEDIR})