diff --git a/src/libcamera/control_ids.yaml b/src/libcamera/control_ids.yaml
index c8874fa9..e6362c74 100644
--- a/src/libcamera/control_ids.yaml
+++ b/src/libcamera/control_ids.yaml
@@ -530,4 +530,15 @@ controls:
         This control is only present when the pipeline supports scaling. Its
         maximum valid value is given by the properties::ScalerCropMaximum
         property, and the two can be used to implement digital zoom.
+
+  - DigitalGain:
+      type: float
+      description: |
+        Global digital gain value applied to the image during all the
+        processing steps after capturing the image from the sensor. Any raw
+        images, therefore, will not include this gain, but the final images
+        output by the imaging pipeline as a whole will include it.
+
+        This control is intended to report the value used by the image
+        processing pipeline.
 ...