diff --git a/code/game/gamemodes/miniantags/umbra/umbra_spawn_event.dm b/code/game/gamemodes/miniantags/umbra/umbra_spawn_event.dm
index 1c8526edf5b..a5fa95f5be2 100644
--- a/code/game/gamemodes/miniantags/umbra/umbra_spawn_event.dm
+++ b/code/game/gamemodes/miniantags/umbra/umbra_spawn_event.dm
@@ -14,4 +14,5 @@
 	var/mob/living/simple_animal/umbra/U = new(pick(xeno_spawn))
 	var/image/alert_overlay = image('icons/mob/mob.dmi', "umbra")
 	notify_ghosts("An umbra has formed in [get_area(U)]. Interact with it to take control of it.", null, source = U, alert_overlay = alert_overlay)
+	spawned_mobs += U
 	return SUCCESSFUL_SPAWN