diff --git a/bindings/wasm/Makefile b/bindings/wasm/Makefile
index 8e91a88..9b9a0b8 100644
--- a/bindings/wasm/Makefile
+++ b/bindings/wasm/Makefile
@@ -3,6 +3,7 @@ all:
 	cp README.pkg.md pkg/README.md
 	tsc types.ts --target esnext --module esnext
 	python fix_types.py
+	rm -f types.js
 
 tests:
 	wasm-pack build --target nodejs && node tests/test.mjs