diff --git a/code/__DEFINES/atmospherics.dm b/code/__DEFINES/atmospherics.dm
index 58947b00d7..0e3aa1a6ff 100644
--- a/code/__DEFINES/atmospherics.dm
+++ b/code/__DEFINES/atmospherics.dm
@@ -160,7 +160,7 @@
 #define ATMOS_TANK_PLASMA			"plasma=70000;TEMP=293.15"
 #define ATMOS_TANK_O2				"o2=100000;TEMP=293.15"
 #define ATMOS_TANK_N2				"n2=100000;TEMP=293.15"
-#define ATMOS_TANK_AIRMIX			"o2=2644;n2=10580;TEMP=293.15"
+#define ATMOS_TANK_AIRMIX			"o2=2811;n2=10583;TEMP=293.15"
 
 //LAVALAND
 #define LAVALAND_EQUIPMENT_EFFECT_PRESSURE 50 //what pressure you have to be under to increase the effect of equipment meant for lavaland