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 d274ba519..7327fa59e 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
@@ -266,7 +266,8 @@ RED.workspaces = (function() {
                         } else if (tab.type === 'subflow') {
                             RED.subflow.delete(tab.id)
                         }
-                    }
+                    },
+                    disabled: (workspaceTabCount === 1)
                 },
                 {
                     label: RED._("menu.label.export"),