diff --git a/src/dronecan/node.js b/src/dronecan/node.js
index b72f730..f5091a6 100644
--- a/src/dronecan/node.js
+++ b/src/dronecan/node.js
@@ -187,7 +187,7 @@ class Node extends EventEmitter {
                     this.emit(topicName, transfer);
                 }
             } else {
-                if (!transfer.dataTypeId || !transfer.payload) {
+                if (transfer.dataTypeId === null || transfer.dataTypeId === undefined || !transfer.payload) {
                     // console.error('#TODO dataTypeId or payload is null');
                     return;
                 }
@@ -425,7 +425,7 @@ class Node extends EventEmitter {
     }
 
     fetchNodeParam(sourceNodeId, index, name, callback=null) {
-        // console.log('Fetching node param:', sourceNodeId, index, name);
+        console.log('Fetching node param:', sourceNodeId, index, name);
         // const currentRequestIndex = index;
         this.nodeParamsRequestingNodeId = sourceNodeId;
         this.setNodeParamsRequestingIndex(sourceNodeId, index);