diff --git a/src/factory.ts b/src/factory.ts
index 5248e4c1c99174bc593cc71d5fd06524ea0fc785..700a923da1e53fc0a8f01bf0f607033623b522ab 100644
--- a/src/factory.ts
+++ b/src/factory.ts
@@ -155,7 +155,7 @@ export async function flashZip(
     blob: Blob,
     wipe: boolean,
     onReconnect: ReconnectCallback,
-    onProgress: FactoryProgressCallback = (action: string, item: string, progress: number) => {}
+    onProgress: FactoryProgressCallback = (_action: string, _item: string, _progress: number) => {}
 ) {
     onProgress("load", "package", 0.0);
     let reader = new ZipReader(new BlobReader(blob));
diff --git a/src/fastboot.ts b/src/fastboot.ts
index 2b56699877849254a55bb0fb8151cc591a8898fa..b94835cdcf2833c493d802f9dfb3335789e0064b 100644
--- a/src/fastboot.ts
+++ b/src/fastboot.ts
@@ -431,7 +431,7 @@ export class FastbootDevice {
      * @param {FlashProgressCallback} onProgress - Callback for upload progress updates.
      * @throws {FastbootError}
      */
-    async upload(partition: string, buffer: ArrayBuffer, onProgress: FlashProgressCallback = (progress) => {}) {
+    async upload(partition: string, buffer: ArrayBuffer, onProgress: FlashProgressCallback = (_progress) => {}) {
         common.logDebug(
             `Uploading single sparse to ${partition}: ${buffer.byteLength} bytes`
         );
@@ -500,7 +500,7 @@ export class FastbootDevice {
      * @param {FlashProgressCallback} onProgress - Callback for flashing progress updates.
      * @throws {FastbootError}
      */
-    async flashBlob(partition: string, blob: Blob, onProgress: FlashProgressCallback = (progress) => {}) {
+    async flashBlob(partition: string, blob: Blob, onProgress: FlashProgressCallback = (_progress) => {}) {
         // Use current slot if partition is A/B
         if ((await this.getVariable(`has-slot:${partition}`)) === "yes") {
             partition += "_" + (await this.getVariable("current-slot"));
@@ -577,7 +577,7 @@ export class FastbootDevice {
      * @param {ReconnectCallback} onReconnect - Callback to request device reconnection.
      * @param {FactoryProgressCallback} onProgress - Progress callback for image flashing.
      */
-    async flashFactoryZip(blob: Blob, wipe: boolean, onReconnect: ReconnectCallback, onProgress: FactoryProgressCallback = (progress) => {}) {
+    async flashFactoryZip(blob: Blob, wipe: boolean, onReconnect: ReconnectCallback, onProgress: FactoryProgressCallback = (_progress) => {}) {
         return await flashFactoryZip(this, blob, wipe, onReconnect, onProgress);
     }
 }