diff --git a/src/libcamera/control_ids.yaml b/src/libcamera/control_ids.yaml
index adea5f90..4742d907 100644
--- a/src/libcamera/control_ids.yaml
+++ b/src/libcamera/control_ids.yaml
@@ -694,6 +694,21 @@ controls:
             Continuous AF is paused. No further state changes or lens movements
             will occur until the AfPauseResume control is sent.
 
+  - StartupFrame:
+      type: bool
+      description: |
+        The value true indicates that the camera system is still in a startup
+        phase where the output images may not be reliable, or that certain of
+        the control algorithms (such as AEC/AGC, AWB, and possibly others) may
+        still be changing quite rapidly.
+
+        Applications are advised to avoid using these frames. Mostly, they will
+        occur when the camera system starts for the first time, although,
+        depending on the sensor and the implementation, they could occur at
+        other times.
+
+        The value false indicates that this is a normal frame.
+
   # ----------------------------------------------------------------------------
   # Draft controls section