diff --git a/code/modules/atmospherics/machinery/airalarm.dm b/code/modules/atmospherics/machinery/airalarm.dm
index 0ffdd8cc426..441fd7b3b0f 100644
--- a/code/modules/atmospherics/machinery/airalarm.dm
+++ b/code/modules/atmospherics/machinery/airalarm.dm
@@ -514,7 +514,7 @@
 			for(var/device_id in A.air_scrub_names)
 				send_signal(device_id, list(
 					"power" = 1,
-					"set_filters" = list(/datum/gas/carbon_dioxide, /datum/gas/miasma),
+					"set_filters" = list(/datum/gas/carbon_dioxide),
 					"scrubbing" = 1,
 					"widenet" = 0,
 				))
@@ -567,7 +567,7 @@
 			for(var/device_id in A.air_scrub_names)
 				send_signal(device_id, list(
 					"power" = 1,
-					"set_filters" = list(/datum/gas/carbon_dioxide, /datum/gas/miasma),
+					"set_filters" = list(/datum/gas/carbon_dioxide),
 					"scrubbing" = 1,
 					"widenet" = 0,
 				))