diff --git a/code/modules/hydroponics/grown/towercap.dm b/code/modules/hydroponics/grown/towercap.dm
index dd322e57d3..5a21cb14e5 100644
--- a/code/modules/hydroponics/grown/towercap.dm
+++ b/code/modules/hydroponics/grown/towercap.dm
@@ -167,7 +167,7 @@
 		var/turf/open/O = loc
 		if(O.air)
 			var/G = O.air.gases
-			if(G["o2"][MOLES] > 16)
+			if(G["o2"][MOLES] > 13)
 				return 1
 	return 0