diff --git a/meshrouter.lua b/meshrouter.lua
index db255e0..c30c9b6 100644
--- a/meshrouter.lua
+++ b/meshrouter.lua
@@ -1,6 +1,6 @@
 local interactions = {}
 local radio = peripheral.find("radio_tower")
-local modem = peripheral.find("modem")
+local modem = peripheral.find("modem",function (s) return peripheral.wrap(s).isWireless() end)
 local distancemap = {}
 local message_queue = {}