diff --git a/libweston/drm-formats.c b/libweston/drm-formats.c
index 2c5e58bb..de35402b 100644
--- a/libweston/drm-formats.c
+++ b/libweston/drm-formats.c
@@ -440,6 +440,7 @@ weston_drm_format_array_subtract(struct weston_drm_format_array *formats_A,
 	if (ret < 0)
 		goto err;
 
+	weston_drm_format_array_destroy(formats_result);
 	return 0;
 
 err: