diff --git a/code/datums/status_effects/debuffs.dm b/code/datums/status_effects/debuffs.dm
index 381e12d9ab..d1288f7e47 100644
--- a/code/datums/status_effects/debuffs.dm
+++ b/code/datums/status_effects/debuffs.dm
@@ -499,7 +499,7 @@
 		C.stuttering = max(5, C.stuttering)
 	if(!old_health)
 		old_health = owner.health
-	if(!old_oxydam)
+	if(!old_oxyloss)
 		old_oxyloss = owner.getOxyLoss()
 	var/health_difference = old_health - owner.health - CLAMP(owner.getOxyLoss() - old_oxyloss,0, owner.getOxyLoss())
 	if(!health_difference)