diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index c6e74b0..5512ed9 100644
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -3460,6 +3460,7 @@
     format.fmt.pix_mp.ycbcr_enc = matrix;
     format.fmt.pix_mp.xfer_func = transfer;
   } else {
+    format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
     format.fmt.pix.colorspace = colorspace;
     format.fmt.pix.quantization = range;
     format.fmt.pix.ycbcr_enc = matrix;