diff --git a/packages/node_modules/@node-red/nodes/core/sequence/17-split.js b/packages/node_modules/@node-red/nodes/core/sequence/17-split.js
index b2e11218a..10c696b76 100644
--- a/packages/node_modules/@node-red/nodes/core/sequence/17-split.js
+++ b/packages/node_modules/@node-red/nodes/core/sequence/17-split.js
@@ -629,6 +629,9 @@ module.exports = function(RED) {
                     joinChar = node.joiner;
                     if (n.count === "" && msg.hasOwnProperty('parts')) {
                         targetCount = msg.parts.count || 0;
+                        if (msg.parts.hasOwnProperty('id')) {
+                            partId = msg.parts.id;
+                        }
                     }
                     if (node.build === 'object') {
                         propertyKey = RED.util.getMessageProperty(msg,node.key);