diff --git a/.changeset/soft-seas-watch.md b/.changeset/soft-seas-watch.md
new file mode 100644
index 000000000..9a1b68e32
--- /dev/null
+++ b/.changeset/soft-seas-watch.md
@@ -0,0 +1,5 @@
+---
+"@react-pdf/reconciler": patch
+---
+
+fix: reconciler build
diff --git a/packages/reconciler/src/index.js b/packages/reconciler/src/index.js
index 92a48ac07..a5bb76266 100644
--- a/packages/reconciler/src/index.js
+++ b/packages/reconciler/src/index.js
@@ -1,8 +1,9 @@
+/* eslint-disable import/extensions */
 /* eslint-disable import/no-extraneous-dependencies */
 
 import React from 'react';
-import createRendererForReact19 from './reconciler-31';
-import createRendererForReact18AndLess from './reconciler-26';
+import createRendererForReact19 from './reconciler-31.js';
+import createRendererForReact18AndLess from './reconciler-26.js';
 
 const isReact19 = React.version.startsWith('19');