diff --git a/Wetterstation/Settings.cs b/Wetterstation/Settings.cs
index 172232efdb0c666e0af73106a2991ab298e5d685..f960fd203a01ef9fbbd03fb3570965ef0df4c9ce 100644
--- a/Wetterstation/Settings.cs
+++ b/Wetterstation/Settings.cs
@@ -45,7 +45,7 @@ namespace Wetterstation
                 ManagementObjectSearcher searcher = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_Processor");
 
                 foreach (ManagementObject queryObj in searcher.Get()) {
-                    result = queryObj["ProcessorId"] + Environment.UserName;
+                    result = queryObj["SerialNumber"] + Environment.UserName;
                 }
             }
             catch (ManagementException e) {