diff --git a/packages/geom/src/with-attribs.ts b/packages/geom/src/with-attribs.ts
index c858f0557a..14b71e69af 100644
--- a/packages/geom/src/with-attribs.ts
+++ b/packages/geom/src/with-attribs.ts
@@ -12,6 +12,6 @@ import type { Attribs, IShape } from "@thi.ng/geom-api";
  */
 export const withAttribs = <T extends IShape>(
 	shape: T,
-	attribs: Attribs,
+	attribs: Attribs = {},
 	replace = true
 ) => <T>shape.withAttribs(replace ? attribs : { ...shape.attribs, ...attribs });