diff --git a/packages/node_modules/@node-red/editor-client/src/js/history.js b/packages/node_modules/@node-red/editor-client/src/js/history.js
index db54701bb..51d0e00a0 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/history.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/history.js
@@ -39,7 +39,7 @@ RED.history = (function() {
                 inverseEv = {
                     t: 'replace',
                     config: RED.nodes.createCompleteNodeSet(),
-                    changed: [],
+                    changed: {},
                     rev: RED.nodes.version()
                 };
                 RED.nodes.clear();