diff --git a/game/ato/flightstate/takeoff.py b/game/ato/flightstate/takeoff.py
index 1ff2facf..f0d39151 100644
--- a/game/ato/flightstate/takeoff.py
+++ b/game/ato/flightstate/takeoff.py
@@ -51,7 +51,7 @@ class Takeoff(AtDeparture):
         if (
             self.flight.client_count > 0
             and self.settings.player_mission_interrupts_sim_at
-            is [StartType.COLD, StartType.WARM, StartType.RUNWAY]
+            in [StartType.COLD, StartType.WARM, StartType.RUNWAY]
         ):
             logging.info(
                 f"Interrupting simulation because {self.flight} has players and has "