diff --git a/code/modules/mob/living/carbon/carbon_defense.dm b/code/modules/mob/living/carbon/carbon_defense.dm
index a51e9c3430e..874d0854440 100644
--- a/code/modules/mob/living/carbon/carbon_defense.dm
+++ b/code/modules/mob/living/carbon/carbon_defense.dm
@@ -778,15 +778,14 @@
 	check_passout()
 
 /**
-* Check to see if we should be passed out from oyxloss
+* Check to see if we should be passed out from oxyloss
 */
 /mob/living/carbon/proc/check_passout()
-	if(!isnum(oxyloss))
-		return
-	if(oxyloss <= 50)
-		if(getOxyLoss() > 50)
+	var/mob_oxyloss = getOxyLoss()
+	if(mob_oxyloss >= 50)
+		if(!HAS_TRAIT_FROM(src, TRAIT_KNOCKEDOUT, OXYLOSS_TRAIT))
 			ADD_TRAIT(src, TRAIT_KNOCKEDOUT, OXYLOSS_TRAIT)
-	else if(getOxyLoss() <= 50)
+	else if(mob_oxyloss < 50)
 		REMOVE_TRAIT(src, TRAIT_KNOCKEDOUT, OXYLOSS_TRAIT)
 
 /mob/living/carbon/get_organic_health()