diff --git a/pal/wasm/wasm-minigame.ts b/pal/wasm/wasm-minigame.ts
index 578b290091c..3f4e2bca437 100644
--- a/pal/wasm/wasm-minigame.ts
+++ b/pal/wasm/wasm-minigame.ts
@@ -22,9 +22,6 @@
  THE SOFTWARE.
 */
 
-// fsUtils is defined in engine-adapter
-declare const fsUtils: any;
-
 export function instantiateWasm (wasmUrl: string, importObject: WebAssembly.Imports): Promise<any> {
     wasmUrl = `cocos-js/${wasmUrl}`;
     return WebAssembly.instantiate(wasmUrl, importObject);
@@ -32,7 +29,7 @@ export function instantiateWasm (wasmUrl: string, importObject: WebAssembly.Impo
 
 export function fetchBuffer (binaryUrl: string): Promise<ArrayBuffer> {
     return new Promise<ArrayBuffer>((resolve, reject) => {
-        fsUtils.readArrayBuffer(`cocos-js/${binaryUrl}`, (err, arrayBuffer) => {
+        globalThis.fsUtils.readArrayBuffer(`cocos-js/${binaryUrl}`, (err, arrayBuffer) => {
             if (err) {
                 reject(err);
                 return;