diff --git a/src/libcamera/control_ids.yaml b/src/libcamera/control_ids.yaml
index 77ebc3f..1bc1b10 100644
--- a/src/libcamera/control_ids.yaml
+++ b/src/libcamera/control_ids.yaml
@@ -239,4 +239,15 @@ controls:
         pixel range (as if pixels ranged from 0 to 65535). The SensorBlackLevels
         control can only be returned in metadata.
       size: [4]
+
+  - Sharpness:
+      type: float
+      description:  |
+        The strength of the sharpening to be applied. The minimum value
+        means minimal (or preferably no) sharpening, the maximum should
+        signify extremely high levels of sharpening (higher than anyone could
+        reasonably want), and the default value should give a "reasonable"
+        level, suitable for many use cases. We recommand that the amount
+        of sharpening applied should be "approximately" proportional to this
+        parameter.
 ...