diff --git a/services/core/java/com/android/server/display/DisplayDeviceConfig.java b/services/core/java/com/android/server/display/DisplayDeviceConfig.java
index 0f9e604651e85..314955b4ed4b6 100644
--- a/services/core/java/com/android/server/display/DisplayDeviceConfig.java
+++ b/services/core/java/com/android/server/display/DisplayDeviceConfig.java
@@ -689,6 +689,8 @@ public class DisplayDeviceConfig {
         if (sensorDetails != null) {
             mAmbientLightSensor.type = sensorDetails.getType();
             mAmbientLightSensor.name = sensorDetails.getName();
+        } else {
+            loadAmbientLightSensorFromConfigXml();
         }
     }