diff --git a/openvidu-client/src/main/java/io/openvidu/client/internal/ProtocolElements.java b/openvidu-client/src/main/java/io/openvidu/client/internal/ProtocolElements.java
index ba3468e6..31f716a0 100644
--- a/openvidu-client/src/main/java/io/openvidu/client/internal/ProtocolElements.java
+++ b/openvidu-client/src/main/java/io/openvidu/client/internal/ProtocolElements.java
@@ -139,6 +139,8 @@ public class ProtocolElements {
 	// ENDTODO
 
 	public static final String VIDEODATA_METHOD = "videoData";
+	
+	public static final String ECHO_METHOD = "echo";
 
 	// ---------------------------- SERVER RESPONSES & EVENTS -----------------