diff --git a/openvidu-browser/src/OpenVidu/Stream.ts b/openvidu-browser/src/OpenVidu/Stream.ts
index 4cb8dcff..fa88527f 100644
--- a/openvidu-browser/src/OpenVidu/Stream.ts
+++ b/openvidu-browser/src/OpenVidu/Stream.ts
@@ -536,12 +536,15 @@ export class Stream {
      * @hidden
      */
     isSendScreen(): boolean {
+        if (!this.outboundStreamOpts) {
+            return false;
+        }
         let screen = this.outboundStreamOpts.publisherProperties.videoSource === 'screen';
         if (platform.isElectron()) {
             screen = typeof this.outboundStreamOpts.publisherProperties.videoSource === 'string' &&
                 this.outboundStreamOpts.publisherProperties.videoSource.startsWith('screen:');
         }
-        return !!this.outboundStreamOpts && screen;
+        return screen;
     }
 
     /**