diff --git a/packages/core/impure.mjs b/packages/core/impure.mjs
index 66fc1dd5..e16cfbe4 100644
--- a/packages/core/impure.mjs
+++ b/packages/core/impure.mjs
@@ -4,7 +4,7 @@ Copyright (C) 2025 Strudel contributors - see <https://codeberg.org/uzu/strudel/
 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 { register, reify } from './pattern.mjs';
+import { register, reify, Pattern } from './pattern.mjs';
 
 let timelines = {};