diff --git a/code/controllers/subsystem/air.dm b/code/controllers/subsystem/air.dm
index 5c74da6d84d..19b2f7c80a1 100644
--- a/code/controllers/subsystem/air.dm
+++ b/code/controllers/subsystem/air.dm
@@ -195,6 +195,8 @@ var/datum/subsystem/air/SSair
 					if(!T.air.check_turf_total(enemy_tile))
 						T.excited = 1
 						active_turfs |= T
+	if(active_turfs.len)
+		warning("There are [active_turfs.len] active turfs at roundstart, this is a mapping error caused by a difference of the air between the adjacent turfs.")
 
 /datum/subsystem/air/proc/setup_atmos_machinery(z_level)
 	for (var/obj/machinery/atmospherics/AM in atmos_machinery)