diff --git a/packages/shader/uniform.mjs b/packages/shader/uniform.mjs
index 58169b993..d7bf23c13 100644
--- a/packages/shader/uniform.mjs
+++ b/packages/shader/uniform.mjs
@@ -4,7 +4,7 @@ Copyright (C) 2024 Strudel contributors
 This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { reify, register, logger } from '@strudel/core';
+import { stack, reify, register, logger } from '@strudel/core';
 import { setUniform } from './shader.mjs';
 
 /**