diff --git a/src/mainboard/samsung/stumpy/devicetree.cb b/src/mainboard/samsung/stumpy/devicetree.cb
index ae3aab5..853e519 100644
--- a/src/mainboard/samsung/stumpy/devicetree.cb
+++ b/src/mainboard/samsung/stumpy/devicetree.cb
@@ -88,9 +88,9 @@
 					# Skip keyboard init
 					register "skip_keyboard" = "true"
 					# Enable PECI on TMPIN3
-					register "peci_tmpin" = "3"
+					register "TMPIN3.mode" = "THERMAL_PECI"
 					# Enable FAN3
-					register "fan3_enable" = "true"
+					register "FAN3.mode" = "FAN_SMART_SOFTWARE"
 
 					device pnp 2e.0 off end # FDC
 					device pnp 2e.1 on # Serial Port 1