diff --git a/exec/nbsrv.lua b/exec/nbsrv.lua
index fa9043e..c3120f3 100644
--- a/exec/nbsrv.lua
+++ b/exec/nbsrv.lua
@@ -8,7 +8,7 @@ end
 local f=io.open(fpath,"rb")
 local nbdata = f:read("*a")
 f:close()
-spawn("nbsrv: "..tostring(nport)..","..fpath,function()
+spawn("nbsrv: "..tostring(nport)..","..fpath,function() print(xpcall(function()
  while true do
   local _, laddress, raddress, port, _, payload = event.pull("modem_message")
   if port == nport and type(payload) == "string" then
@@ -23,5 +23,5 @@ spawn("nbsrv: "..tostring(nport)..","..fpath,function()
    end
   end
  end
-end)
+end)) end)
 print("[nbsrv] nbsrv started.")