diff --git a/packages/auth_server.lua b/packages/auth_server.lua
index 32f8536..9fcf97d 100644
--- a/packages/auth_server.lua
+++ b/packages/auth_server.lua
@@ -186,7 +186,7 @@ while true do
             rednet.send(client_id, "invalid request", "auth")
         end
 
-        if data.users[request.username].groups == nil or data.users[request.username].groups[request.group] or data.users[request.username].groups[request.group] == false then
+        if data.users[request.username].groups == nil or data.users[request.username].groups[request.group] == nil or data.users[request.username].groups[request.group] == false then
             rednet.send(client_id, false, "auth")
         else
             rednet.send(client_id, true, "auth")