diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/workspaces.js b/packages/node_modules/@node-red/editor-client/src/js/ui/workspaces.js
index 365d827f7..bd52498f1 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/workspaces.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/workspaces.js
@@ -909,7 +909,11 @@ RED.workspaces = (function() {
                 document.title = `${documentTitle} : ${workspace.label}`;
             } else {
                 var subflow = RED.nodes.subflow(RED.workspaces.active());
-                document.title = `${documentTitle} : ${subflow.name}`;
+                if (subflow) {
+                    document.title = `${documentTitle} : ${subflow.name}`;
+                } else {
+                    document.title = documentTitle
+                }
             }
             RED.nodes.eachWorkspace(function(ws) {
                 workspace_tabs.renameTab(ws.id,ws.label);