diff --git a/code/modules/hydroponics/grown/towercap.dm b/code/modules/hydroponics/grown/towercap.dm
index e03027d06ed..a38e0f88a4e 100644
--- a/code/modules/hydroponics/grown/towercap.dm
+++ b/code/modules/hydroponics/grown/towercap.dm
@@ -170,7 +170,7 @@
 		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