diff --git a/src/libcamera/control_ids.yaml b/src/libcamera/control_ids.yaml
index c3232abf..8fbcc5f6 100644
--- a/src/libcamera/control_ids.yaml
+++ b/src/libcamera/control_ids.yaml
@@ -312,9 +312,11 @@ controls:
 
   - ColourTemperature:
       type: int32_t
-      description: Report the current estimate of the colour temperature, in
-        kelvin, for this frame. The ColourTemperature control can only be
-        returned in metadata.
+      description: |
+        Report the current estimate of the colour temperature, in kelvin, for
+        this frame. An implementation may also allow this control to be set so
+        as to disable the AWB algorithm whilst setting the colour gains to the
+        correct fixed ones for this colour temperature.
 
   - Saturation:
       type: float