diff --git a/.changeset/red-maps-happen.md b/.changeset/red-maps-happen.md
new file mode 100644
index 0000000000..a21108df2a
--- /dev/null
+++ b/.changeset/red-maps-happen.md
@@ -0,0 +1,5 @@
+---
+"livekit-client": patch
+---
+
+Prevent undefined access to engine in connection reconciler
diff --git a/src/room/Room.ts b/src/room/Room.ts
index 6319d1768d..effcb84a64 100644
--- a/src/room/Room.ts
+++ b/src/room/Room.ts
@@ -1903,10 +1903,12 @@ class Room extends (EventEmitter as new () => TypedEmitter<RoomEventCallbacks>)
         this.log.warn('detected connection state mismatch', {
           ...this.logContext,
           numFailures: consecutiveFailures,
-          engine: {
-            closed: this.engine.isClosed,
-            transportsConnected: this.engine.verifyTransport(),
-          },
+          engine: this.engine
+            ? {
+                closed: this.engine.isClosed,
+                transportsConnected: this.engine.verifyTransport(),
+              }
+            : undefined,
         });
         if (consecutiveFailures >= 3) {
           this.recreateEngine();