diff --git a/.changeset/kind-nails-battle.md b/.changeset/kind-nails-battle.md
new file mode 100644
index 0000000000..74b425761c
--- /dev/null
+++ b/.changeset/kind-nails-battle.md
@@ -0,0 +1,5 @@
+---
+"livekit-client": patch
+---
+
+Fix resumeUpstream with local track processors enabled
diff --git a/src/room/track/LocalTrack.ts b/src/room/track/LocalTrack.ts
index 1529816a3d..be93ebb305 100644
--- a/src/room/track/LocalTrack.ts
+++ b/src/room/track/LocalTrack.ts
@@ -433,7 +433,7 @@ export default abstract class LocalTrack<
       this.emit(TrackEvent.UpstreamResumed, this);
 
       // this operation is noop if mediastreamtrack is already being sent
-      await this.sender.replaceTrack(this._mediaStreamTrack);
+      await this.sender.replaceTrack(this.mediaStreamTrack);
     } finally {
       unlock();
     }