diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
index b2c3d12..a2c8f67 100644
--- a/libweston/compositor-drm.c
+++ b/libweston/compositor-drm.c
@@ -1280,11 +1280,6 @@
 		goto err_free;
 	}
 
-	/* We can scanout an ARGB buffer if the surface's opaque region covers
-	 * the whole output, but we have to use XRGB as the KMS format code. */
-	if (is_opaque)
-		fb->format = pixel_format_get_opaque_substitute(fb->format);
-
 	if (backend->min_width > fb->width ||
 	    fb->width > backend->max_width ||
 	    backend->min_height > fb->height ||