diff --git a/src/mame/tektronix/tek440x.cpp b/src/mame/tektronix/tek440x.cpp
index 17e95613294e7..66888e320e54a 100644
--- a/src/mame/tektronix/tek440x.cpp
+++ b/src/mame/tektronix/tek440x.cpp
@@ -1677,4 +1677,4 @@ ROM_END
  *
  *************************************/
 //    YEAR  NAME     PARENT  COMPAT  MACHINE  INPUT    CLASS          INIT        COMPANY      FULLNAME                               FLAGS
-COMP( 1984, tek4404, 0,      0,      tek4404, tek4404, tek440x_state, empty_init, "Tektronix", "4404 Artificial Intelligence System", MACHINE_NOT_WORKING  )
+COMP( 1984, tek4404, 0,      0,      tek4404, tek4404, tek440x_state, empty_init, "Tektronix", "4404 Artificial Intelligence System", MACHINE_NODEVICE_LAN  )