diff --git a/src/libcamera/control_ids.yaml b/src/libcamera/control_ids.yaml
index 9d4638ae..c3f593a1 100644
--- a/src/libcamera/control_ids.yaml
+++ b/src/libcamera/control_ids.yaml
@@ -291,7 +291,7 @@ controls:
         transformation. The 3x3 matrix is stored in conventional reading
         order in an array of 9 floating point values.

-      size: [3x3]
+      size: [3,3]

   - ScalerCrop:
       type: Rectangle
diff --git a/src/libcamera/property_ids.yaml b/src/libcamera/property_ids.yaml
index 12ecbce5..47c350ed 100644
--- a/src/libcamera/property_ids.yaml
+++ b/src/libcamera/property_ids.yaml
@@ -497,7 +497,7 @@ controls:

   - PixelArrayOpticalBlackRectangles:
       type: Rectangle
-      size: [n]
+      size: []
       description: |
         The pixel array region(s) which contain optical black pixels
         considered valid for calibration purposes.
@@ -592,7 +592,7 @@ controls:

   - PixelArrayActiveAreas:
       type: Rectangle
-      size: [n]
+      size: []
       description: |
         The PixelArrayActiveAreas property defines the (possibly multiple and
         overlapping) portions of the camera sensor readable pixel matrix