diff --git a/code/modules/nifsoft/software/05_health.dm b/code/modules/nifsoft/software/05_health.dm
index de7ef184cb..2337d58029 100644
--- a/code/modules/nifsoft/software/05_health.dm
+++ b/code/modules/nifsoft/software/05_health.dm
@@ -203,8 +203,8 @@
 
 	proc/resp_breath()
 		if(!active) return null
-		var/datum/gas_mixture/breath = new()
-		breath.adjust_gas("oxygen", 300)
+		var/datum/gas_mixture/breath = new(BREATH_VOLUME)
+		breath.adjust_gas("oxygen", BREATH_MOLES)
 		breath.temperature = T20C
 		return breath