diff --git a/openvidu-server/src/main/java/io/openvidu/server/core/Session.java b/openvidu-server/src/main/java/io/openvidu/server/core/Session.java
index 28686a2d..77850933 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/core/Session.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/core/Session.java
@@ -256,7 +256,9 @@ public class Session implements SessionInterface {
 		connections.add("content", participants);
 		json.add("connections", connections);
 		json.addProperty("recording", this.recordingManager.sessionIsBeingRecorded(this.sessionId));
-		json.addProperty("forcedVideoCodec", this.sessionProperties.forcedVideoCodec().name());
+		if (this.sessionProperties.forcedVideoCodec() != null) {
+			json.addProperty("forcedVideoCodec", this.sessionProperties.forcedVideoCodec().name());
+		}
 		json.addProperty("allowTranscoding", this.sessionProperties.isTranscodingAllowed());
 		return json;
 	}