diff --git a/openvidu-browser/src/OpenVidu/Stream.ts b/openvidu-browser/src/OpenVidu/Stream.ts
index b3671ec4..12464311 100644
--- a/openvidu-browser/src/OpenVidu/Stream.ts
+++ b/openvidu-browser/src/OpenVidu/Stream.ts
@@ -78,7 +78,9 @@ export class Stream implements EventDispatcher {
     audioActive: boolean;
 
     /**
-     * Unique identifier of the stream
+     * Unique identifier of the stream. If the stream belongs to a...
+     * - Subscriber object: property `streamId` is always defined
+     * - Publisher object: property `streamId` is only defined after successful execution of [[Session.publish]]
      */
     streamId: string;