diff --git a/build.js b/build.js
index 863c3c2..0ec588c 100755
--- a/build.js
+++ b/build.js
@@ -7,7 +7,6 @@ const entryPoints = fs
   .filter(
     file =>
       file.endsWith('.ts') &&
-      file !== 'core.ts' &&
       file !== 'test-helpers.ts' &&
       file !== 'helpers.ts' &&
       file !== 'benchmarks.ts' &&