diff --git a/hwmonDaemon.py b/hwmonDaemon.py
index 6e04276..71e9f96 100644
--- a/hwmonDaemon.py
+++ b/hwmonDaemon.py
@@ -876,6 +876,7 @@ class SystemHealthMonitor:
                     'smart_status': 'UNKNOWN'
                 }
                 
+                mountpoint = disk_to_mount.get(disk)
                 # Get disk usage if mounted
                 if mountpoint:
                     usage = psutil.disk_usage(mountpoint)