diff --git a/packages/ffmpeg/src/classes.ts b/packages/ffmpeg/src/classes.ts
index 8dd50e2560..bb366d9cba 100644
--- a/packages/ffmpeg/src/classes.ts
+++ b/packages/ffmpeg/src/classes.ts
@@ -148,9 +148,9 @@ export class FFmpeg {
     callback: LogEventCallback | ProgressEventCallback
   ) {
     if (event === "log") {
-      this.#logEventCallbacks.filter((f) => f !== callback);
+      this.#logEventCallbacks = this.#logEventCallbacks.filter((f) => f !== callback);
     } else if (event === "progress") {
-      this.#progressEventCallbacks.filter((f) => f !== callback);
+      this.#progressEventCallbacks = this.#progressEventCallbacks.filter((f) => f !== callback);
     }
   }