diff --git a/openvidu-browser/src/OpenVidu/Session.ts b/openvidu-browser/src/OpenVidu/Session.ts
index 4a79f35f..8f8ebf5b 100644
--- a/openvidu-browser/src/OpenVidu/Session.ts
+++ b/openvidu-browser/src/OpenVidu/Session.ts
@@ -521,9 +521,10 @@ export class Session implements EventDispatcher {
 
             if (signal.to && signal.to.length > 0) {
                 const connectionIds: string[] = [];
-
                 signal.to.forEach(connection => {
-                    connectionIds.push(connection.connectionId);
+                    if (!!connection.connectionId) {
+                        connectionIds.push(connection.connectionId);
+                    }
                 });
                 signalMessage['to'] = connectionIds;
             } else {