diff --git a/overlay/common/frameworks/base/core/res/res/values/config.xml b/overlay/common/frameworks/base/core/res/res/values/config.xml
index 5c735a1..fc7c095 100644
--- a/overlay/common/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/common/frameworks/base/core/res/res/values/config.xml
@@ -96,4 +96,8 @@
     <!-- Flag indicating which package name can access DeviceConfig table -->
     <string name="config_deviceConfiguratorPackageName" translatable="false">org.protonaosp.deviceconfig</string>
 
+    <!-- The type of the light sensor to be used by the display framework for things like
+         auto-brightness. If unset, then it just gets the default sensor of type TYPE_LIGHT. -->
+    <string name="config_displayLightSensorType" translatable="false">android.sensor.light</string>
+
 </resources>