diff --git a/openvidu-browser/src/OpenVidu/Session.ts b/openvidu-browser/src/OpenVidu/Session.ts
index c83eea6c..95b9de7c 100644
--- a/openvidu-browser/src/OpenVidu/Session.ts
+++ b/openvidu-browser/src/OpenVidu/Session.ts
@@ -957,11 +957,11 @@ export class Session extends EventDispatcher {
      */
     onNetworkQualityLevelChangedChanged(msg): void {
         if (msg.connectionId === this.connection.connectionId) {
-            this.ee.emitEvent('networkQualityLevelChanged', [new NetworkQualityLevelChangedEvent(this, msg.qualityLevel, this.connection)]);
+            this.ee.emitEvent('networkQualityLevelChanged', [new NetworkQualityLevelChangedEvent(this, msg.newValue, msg.oldValue, this.connection)]);
         } else {
             this.getConnection(msg.connectionId, 'Connection not found for connectionId ' + msg.connectionId)
                 .then((connection: Connection) => {
-                    this.ee.emitEvent('networkQualityLevelChanged', [new NetworkQualityLevelChangedEvent(this, msg.qualityLevel, connection)]);
+                    this.ee.emitEvent('networkQualityLevelChanged', [new NetworkQualityLevelChangedEvent(this, msg.newValue, msg.oldValue, connection)]);
                 })
                 .catch(openViduError => {
                     logger.error(openViduError);
diff --git a/openvidu-browser/src/OpenViduInternal/Events/NetworkQualityLevelChangedEvent.ts b/openvidu-browser/src/OpenViduInternal/Events/NetworkQualityLevelChangedEvent.ts
index 0dbfdc95..592e62a7 100644
--- a/openvidu-browser/src/OpenViduInternal/Events/NetworkQualityLevelChangedEvent.ts
+++ b/openvidu-browser/src/OpenViduInternal/Events/NetworkQualityLevelChangedEvent.ts
@@ -30,7 +30,12 @@ export class NetworkQualityLevelChangedEvent extends Event {
     /**
      * New value of the network quality level
      */
-    qualityLevel: number;
+    newValue: number;
+
+    /**
+     * Old value of the network quality level
+     */
+    oldValue: number;
 
     /**
      * Connection for whom the network quality level changed
@@ -40,9 +45,10 @@ export class NetworkQualityLevelChangedEvent extends Event {
     /**
      * @hidden
      */
-    constructor(target: Session, qualityLevel: number, connection: Connection) {
+    constructor(target: Session, newValue: number, oldValue: number, connection: Connection) {
         super(false, target, 'networkQualityLevelChanged');
-        this.qualityLevel = qualityLevel;
+        this.newValue = newValue;
+        this.oldValue = oldValue;
         this.connection = connection;
     }
 
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 f347c2cf..1638425d 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
@@ -99,7 +99,8 @@ public class ProtocolElements {
 
 	public static final String NETWORKQUALITYLEVELCHANGED_METHOD = "networkQualityLevelChanged";
 	public static final String NETWORKQUALITYCHANGED_CONNECTIONID_PARAM = "connectionId";
-	public static final String NETWORKQUALITYCHANGED_QUALITYLEVEL_PARAM = "qualityLevel";
+	public static final String NETWORKQUALITYCHANGED_NEWVALUE_PARAM = "newValue";
+	public static final String NETWORKQUALITYCHANGED_OLDVALUE_PARAM = "oldValue";
 
 	public static final String FORCEDISCONNECT_METHOD = "forceDisconnect";
 	public static final String FORCEDISCONNECT_CONNECTIONID_PARAM = "connectionId";