diff --git a/auth.lua b/auth.lua
index ae41c95..3bab1c5 100644
--- a/auth.lua
+++ b/auth.lua
@@ -10,7 +10,7 @@ local action = args[1]
 settings.define("auth.token", {
     description = "Authentication token",
     type = "number",
-    default = ""
+    default = -1
 })
 
 settings.define("auth.server", {
@@ -85,7 +85,7 @@ if action == "login" then
 end
 
 if action == "logout" then
-    settings.set("auth.token", nil)
+    settings.set("auth.token", -1)
     settings.save()
     io.write("Logged out\n")
     return
diff --git a/auth_server.lua b/auth_server.lua
index c7016a9..8a11f68 100644
--- a/auth_server.lua
+++ b/auth_server.lua
@@ -104,7 +104,7 @@ while true do
     end
 
     if request.action == "token" then
-        if request.token == nil or request.token == "" then
+        if request.token == nil or request.token == "" or request.token == -1 then
             rednet.send(client_id, "invalid request", "auth")
         else