diff --git a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/CoolingDevice.aidl b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/CoolingDevice.aidl
index dfd8686..dff3c4c 100644
--- a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/CoolingDevice.aidl
+++ b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/CoolingDevice.aidl
@@ -33,7 +33,7 @@
 
 package android.hardware.thermal;
 /* @hide */
-@VintfStability
+@JavaDerive(toString=true) @VintfStability
 parcelable CoolingDevice {
   android.hardware.thermal.CoolingType type;
   String name;
diff --git a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/Temperature.aidl b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/Temperature.aidl
index 3bf08bf..ce70ab8 100644
--- a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/Temperature.aidl
+++ b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/Temperature.aidl
@@ -33,7 +33,7 @@
 
 package android.hardware.thermal;
 /* @hide */
-@VintfStability
+@JavaDerive(toString=true) @VintfStability
 parcelable Temperature {
   android.hardware.thermal.TemperatureType type;
   String name;
diff --git a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/TemperatureThreshold.aidl b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/TemperatureThreshold.aidl
index c5ca4b9..a384d19 100644
--- a/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/TemperatureThreshold.aidl
+++ b/thermal/aidl/aidl_api/android.hardware.thermal/current/android/hardware/thermal/TemperatureThreshold.aidl
@@ -33,7 +33,7 @@
 
 package android.hardware.thermal;
 /* @hide */
-@VintfStability
+@JavaDerive(toString=true) @VintfStability
 parcelable TemperatureThreshold {
   android.hardware.thermal.TemperatureType type;
   String name;
diff --git a/thermal/aidl/android/hardware/thermal/CoolingDevice.aidl b/thermal/aidl/android/hardware/thermal/CoolingDevice.aidl
index 1f2360d..0c5c17d 100644
--- a/thermal/aidl/android/hardware/thermal/CoolingDevice.aidl
+++ b/thermal/aidl/android/hardware/thermal/CoolingDevice.aidl
@@ -20,6 +20,7 @@
 
 /* @hide */
 @VintfStability
+@JavaDerive(toString=true)
 parcelable CoolingDevice {
     /**
      * This cooling device type, CPU, GPU, BATTERY, and etc.
diff --git a/thermal/aidl/android/hardware/thermal/Temperature.aidl b/thermal/aidl/android/hardware/thermal/Temperature.aidl
index 281d68d..b3f6700 100644
--- a/thermal/aidl/android/hardware/thermal/Temperature.aidl
+++ b/thermal/aidl/android/hardware/thermal/Temperature.aidl
@@ -21,6 +21,7 @@
 
 /* @hide */
 @VintfStability
+@JavaDerive(toString=true)
 parcelable Temperature {
     /**
      * This temperature's type.
diff --git a/thermal/aidl/android/hardware/thermal/TemperatureThreshold.aidl b/thermal/aidl/android/hardware/thermal/TemperatureThreshold.aidl
index 0714c82..94991ae 100644
--- a/thermal/aidl/android/hardware/thermal/TemperatureThreshold.aidl
+++ b/thermal/aidl/android/hardware/thermal/TemperatureThreshold.aidl
@@ -20,6 +20,7 @@
 
 /* @hide */
 @VintfStability
+@JavaDerive(toString=true)
 parcelable TemperatureThreshold {
     /**
      * This temperature's type.