diff --git a/libsquoosh/src/emscripten-utils.ts b/libsquoosh/src/emscripten-utils.ts
index 428be004..a6481508 100644
--- a/libsquoosh/src/emscripten-utils.ts
+++ b/libsquoosh/src/emscripten-utils.ts
@@ -10,13 +10,16 @@ export function pathify(path: string): string {
 export function instantiateEmscriptenWasm<T extends EmscriptenWasm.Module>(
   factory: EmscriptenWasm.ModuleFactory<T>,
   path: string,
-  workerWasm: string = '',
+  workerJS: string = '',
 ): Promise<T> {
   return factory({
     locateFile(requestPath) {
+      // The glue code generated by emscripten uses the original
+      // file names of the worker file and the wasm binary.
+      // These will have changed in the bundling process and
+      // we need to inject them here.
       if (requestPath.endsWith('.wasm')) return pathify(path);
-      if (requestPath.endsWith('.worker.js'))
-        return new URL(workerWasm).pathname;
+      if (requestPath.endsWith('.worker.js')) return new URL(workerJS).pathname;
       return requestPath;
     },
   });