diff --git a/host/x86_64-linux/max/Power.nix b/host/x86_64-linux/max/Power.nix
index 76188c49..05c0c838 100644
--- a/host/x86_64-linux/max/Power.nix
+++ b/host/x86_64-linux/max/Power.nix
@@ -49,8 +49,8 @@ in
       wm2fc
     ];
     script = ''
-      old=0
-      oldtemp=0
+      old=-1
+      oldtemp=-1
       smooth=0
       while true; do
         temp=$(cat /sys/devices/pci0000\:00/0000\:00\:18.3/hwmon/*/temp1_input)