diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 7a90a8fdc28..cb1053f4d90 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -536,8 +536,7 @@
 				var/ratio = inhale_pp/safe_pressure_min
 
 				 // Don't fuck them up too fast (space only does HUMAN_MAX_OXYLOSS after all!)
-				 // What's going on here? ratio will always be < 1, and HUMAN_MAX_OXYLOSS = 1...
-				adjustOxyLoss(min(5*(1/ratio), HUMAN_MAX_OXYLOSS))
+				adjustOxyLoss(min(5*(1 - ratio), HUMAN_MAX_OXYLOSS))
 				failed_last_breath = 1
 				inhaled_gas_used = inhaling*ratio/6