diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp
index ba5f88cd41ed..f4752f8bb23f 100644
--- a/src/libcamera/v4l2_videodevice.cpp
+++ b/src/libcamera/v4l2_videodevice.cpp
@@ -1711,6 +1711,7 @@ FrameBuffer *V4L2VideoDevice::dequeueBuffer()
 			return buffer;
 		}
 
+		/* Single planar format stored in a multiplanar buffer */
 		unsigned int bytesused = multiPlanar ? planes[0].bytesused
 				       : buf.bytesused;