diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 04d5e088733..7a90a8fdc28 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -533,10 +533,11 @@
 			if(prob(20))
 				spawn(0) emote("gasp")
 			if(inhale_pp > 0)
-				var/ratio = safe_pressure_min/inhale_pp
+				var/ratio = inhale_pp/safe_pressure_min
 
 				 // Don't fuck them up too fast (space only does HUMAN_MAX_OXYLOSS after all!)
-				adjustOxyLoss(min(5*ratio, HUMAN_MAX_OXYLOSS))
+				 // What's going on here? ratio will always be < 1, and HUMAN_MAX_OXYLOSS = 1...
+				adjustOxyLoss(min(5*(1/ratio), HUMAN_MAX_OXYLOSS))
 				failed_last_breath = 1
 				inhaled_gas_used = inhaling*ratio/6