diff --git a/code/game/machinery/computer/communications.dm b/code/game/machinery/computer/communications.dm
index ce45b070253..1279f4ac9d0 100644
--- a/code/game/machinery/computer/communications.dm
+++ b/code/game/machinery/computer/communications.dm
@@ -49,7 +49,7 @@ var/const/CALL_SHUTTLE_REASON_LENGTH = 12
 /obj/machinery/computer/communications/Topic(href, href_list)
 	if(..())
 		return
-	if (src.z > 2) //Can only use on centcom and SS13
+	if (src.z > ZLEVEL_CENTCOM) //Can only use on centcom and SS13
 		usr << "<span class='boldannounce'>Unable to establish a connection</span>: \black You're too far away from the station!"
 		return
 	usr.set_machine(src)