diff --git a/clients/simple-dmabuf-v4l.c b/clients/simple-dmabuf-v4l.c
index de77e36d..af25d0ea 100644
--- a/clients/simple-dmabuf-v4l.c
+++ b/clients/simple-dmabuf-v4l.c
@@ -360,7 +360,12 @@ create_dmabuf_buffer(struct display *display, struct buffer *buffer)
 	unsigned i;
 
 	modifier = 0;
-	flags = ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT;
+	flags = 0;
+
+	/* XXX: apparently some webcams may actually provide y-inverted images,
+	 * in which case we should set
+	 * flags = ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT
+	 */
 
 	params = zwp_linux_dmabuf_v1_create_params(display->dmabuf);
 	for (i = 0; i < display->format.num_planes; ++i)
diff --git a/libweston/gl-renderer.c b/libweston/gl-renderer.c
index ff487908..031576bc 100644
--- a/libweston/gl-renderer.c
+++ b/libweston/gl-renderer.c
@@ -1824,8 +1824,14 @@ gl_renderer_attach_dmabuf(struct weston_surface *surface,
 
 	buffer->width = dmabuf->attributes.width;
 	buffer->height = dmabuf->attributes.height;
+
+	/*
+	 * GL-renderer uses the OpenGL convention of texture coordinates, where
+	 * the origin is at bottom-left. Because dmabuf buffers have the origin
+	 * at top-left, we must invert the Y_INVERT flag to get the image right.
+	 */
 	buffer->y_inverted =
-		!!(dmabuf->attributes.flags & ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT);
+		!(dmabuf->attributes.flags & ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT);
 
 	for (i = 0; i < gs->num_images; i++)
 		egl_image_unref(gs->images[i]);