diff --git a/libraries/fabric-shim/lib/handler.js b/libraries/fabric-shim/lib/handler.js
index e521f8aa..f61be718 100644
--- a/libraries/fabric-shim/lib/handler.js
+++ b/libraries/fabric-shim/lib/handler.js
@@ -310,7 +310,7 @@ class ChaincodeMessageHandler {
         let state = 'created';
 
         stream.on('data', function (msg) {
-            logger.debug('Received chat message from peer: %j, state: %s', msg, state);
+            logger.debug('Received chat message from peer: %s, state: %s', msg.txid, state);
 
             if (state === STATES.Ready) {
                 const type = msg.type;