diff --git a/code/ATMOSPHERICS/components/omni_devices/filter.dm b/code/ATMOSPHERICS/components/omni_devices/filter.dm
index d9009168c5..074c6c528d 100644
--- a/code/ATMOSPHERICS/components/omni_devices/filter.dm
+++ b/code/ATMOSPHERICS/components/omni_devices/filter.dm
@@ -88,7 +88,7 @@
 	return 1
 
 /obj/machinery/atmospherics/omni/atmos_filter/ui_interact(mob/user, ui_key = "main", var/datum/nanoui/ui = null, var/force_open = 1)
-	usr.set_machine(src)
+	user.set_machine(src)
 
 	var/list/data = new()