diff --git a/thermal/1.0/default/Thermal.h b/thermal/1.0/default/Thermal.h
index 2e06289..eec0ff5 100644
--- a/thermal/1.0/default/Thermal.h
+++ b/thermal/1.0/default/Thermal.h
@@ -45,6 +45,7 @@
     Return<void> getTemperatures(getTemperatures_cb _hidl_cb)  override;
     Return<void> getCpuUsages(getCpuUsages_cb _hidl_cb)  override;
     Return<void> getCoolingDevices(getCoolingDevices_cb _hidl_cb)  override;
+    Return<void> getUndefinedTemperature(getUndefinedTemperature_cb _hidl_cb) override;
     private:
         thermal_module_t* mModule;
 };