diff --git a/code/game/machinery/ARES/ARES_step_triggers.dm b/code/game/machinery/ARES/ARES_step_triggers.dm
index 011702aa0c6d..fbb7390027b6 100644
--- a/code/game/machinery/ARES/ARES_step_triggers.dm
+++ b/code/game/machinery/ARES/ARES_step_triggers.dm
@@ -89,6 +89,15 @@
 	alert_id = "AresCore"
 	pass_accesses = list(ACCESS_MARINE_AI_TEMP, ACCESS_MARINE_AI, ACCESS_ARES_DEBUG)
 
+/obj/effect/step_trigger/ares_alert/core/Crossed(mob/living/passer)
+	if(isxeno(passer))
+		if(!COOLDOWN_FINISHED(datacore, aicore_lockdown))
+			return FALSE
+		aicore_lockdown(user, "ATTENTION! \n\nUNIDENTIFIED BIOSIGN DETECTED IN AI CORE! \n\nAI CORE UNDER LOCKDOWN.")
+		return TRUE
+	else
+		..()
+
 /obj/effect/step_trigger/ares_alert/mainframe
 	alert_id = "AresMainframe"
 	alert_message = "ALERT: Unauthorized movement detected in ARES Mainframe!"
diff --git a/code/game/machinery/aicore_lockdown.dm b/code/game/machinery/aicore_lockdown.dm
index 8120e98977dc..3ecc357bf41f 100644
--- a/code/game/machinery/aicore_lockdown.dm
+++ b/code/game/machinery/aicore_lockdown.dm
@@ -84,8 +84,10 @@
 		return PROC_BLOCKED
 
 	var/log = "[key_name(user)] triggered AI core lockdown!"
-	var/ares_log = "Triggered triggered AI Core Emergency Lockdown."
+	var/ares_log = "Triggered AI Core Emergency Lockdown."
 	var/person = user.name
+	if(isxeno(user))
+		person = MAIN_AI_SYSTEM
 	if(message)
 		log = "[key_name(user)] triggered AI core emergency lockdown! (Using a custom announcement)."
 	if(admin)