diff --git a/thermal/1.0/vts/Thermal.vts b/thermal/1.0/vts/Thermal.vts
index e76d943..4611924 100644
--- a/thermal/1.0/vts/Thermal.vts
+++ b/thermal/1.0/vts/Thermal.vts
@@ -5,6 +5,7 @@
 package: "android.hardware.thermal"
 
 import: "android.hardware.thermal@1.0::types"
+import: "android.hidl.base@1.0::types"
 
 interface: {
     api: {
diff --git a/thermal/1.0/vts/types.vts b/thermal/1.0/vts/types.vts
index 1e60f48..f004bd8 100644
--- a/thermal/1.0/vts/types.vts
+++ b/thermal/1.0/vts/types.vts
@@ -9,27 +9,27 @@
     name: "::android::hardware::thermal::V1_0::TemperatureType"
     type: TYPE_ENUM
     enum_value: {
-        scalar_type: "uint32_t"
+        scalar_type: "int32_t"
 
         enumerator: "UNKNOWN"
         scalar_value: {
-            uint32_t: 1000
+            int32_t: -1
         }
         enumerator: "CPU"
         scalar_value: {
-            uint32_t: 0
+            int32_t: 0
         }
         enumerator: "GPU"
         scalar_value: {
-            uint32_t: 1
+            int32_t: 1
         }
         enumerator: "BATTERY"
         scalar_value: {
-            uint32_t: 2
+            int32_t: 2
         }
         enumerator: "SKIN"
         scalar_value: {
-            uint32_t: 3
+            int32_t: 3
         }
     }
 }