diff --git a/code/datums/diseases/advance/symptoms/fire.dm b/code/datums/diseases/advance/symptoms/fire.dm
index 1466bc86459..88281cf94f8 100644
--- a/code/datums/diseases/advance/symptoms/fire.dm
+++ b/code/datums/diseases/advance/symptoms/fire.dm
@@ -45,13 +45,13 @@ Bonus
 	return
 
 /datum/symptom/fire/proc/Firestacks_stage_4(mob/living/M, datum/disease/advance/A)
-	var/get_stacks = (sqrtor0(20+A.totalStageSpeed()*2))-(sqrtor0(16+A.totalStealth()))
+	var/get_stacks = max((sqrtor0(20 + A.totalStageSpeed() * 2)) - (sqrtor0(16 + A.totalStealth())), 1)
 	M.adjust_fire_stacks(get_stacks)
-	M.adjustFireLoss(get_stacks/2)
+	M.adjustFireLoss(get_stacks / 2)
 	return 1
 
 /datum/symptom/fire/proc/Firestacks_stage_5(mob/living/M, datum/disease/advance/A)
-	var/get_stacks = (sqrtor0(20+A.totalStageSpeed()*3))-(sqrtor0(16+A.totalStealth()))
+	var/get_stacks = max((sqrtor0(20 + A.totalStageSpeed() * 3))-(sqrtor0(16 + A.totalStealth())), 1)
 	M.adjust_fire_stacks(get_stacks)
 	M.adjustFireLoss(get_stacks)
 	return 1
\ No newline at end of file