diff --git a/src/libcamera/control_ids_core.yaml b/src/libcamera/control_ids_core.yaml
index 73643e7e84..d27be4be6a 100644
--- a/src/libcamera/control_ids_core.yaml
+++ b/src/libcamera/control_ids_core.yaml
@@ -188,6 +188,11 @@ controls:
         - name: Custom
           value: 3
           description: Custom exposure mode.
+        - name: Maximize
+          value: 4
+          description: |
+            Exposure mode allowing very large exposure times and gains,
+            up to the sensors capabilities.
 
   - ExposureValue:
       type: float