diff --git a/spa/plugins/v4l2/v4l2-utils.c b/spa/plugins/v4l2/v4l2-utils.c
index c14037d1a..66d241bbc 100644
--- a/spa/plugins/v4l2/v4l2-utils.c
+++ b/spa/plugins/v4l2/v4l2-utils.c
@@ -1072,7 +1072,7 @@ static int query_ext_ctrl_ioctl(struct port *port, struct v4l2_query_ext_ctrl *q
 
 	if (port->have_query_ext_ctrl) {
 		res = xioctl(dev->fd, VIDIOC_QUERY_EXT_CTRL, qctrl);
-		if (errno != ENOTTY)
+		if (res == 0 || errno != ENOTTY)
 			return res;
 		port->have_query_ext_ctrl = false;
 	}