diff --git a/code/FEA/FEA_turf_tile.dm b/code/FEA/FEA_turf_tile.dm
index cfbc4514d0b..b9e70451b1e 100644
--- a/code/FEA/FEA_turf_tile.dm
+++ b/code/FEA/FEA_turf_tile.dm
@@ -196,7 +196,8 @@ turf
 			..()
 
 		assume_air(datum/gas_mixture/giver)
-			if(air)
+			var/datum/gas_mixture/receiver = air
+			if(istype(receiver))
 				if(parent&&parent.group_processing)
 					if(!parent.air.check_then_merge(giver))
 						parent.suspend_group_processing()