diff --git a/simple-mind-map/src/plugins/OuterFrame.js b/simple-mind-map/src/plugins/OuterFrame.js
index 121f67ba..b59f8950 100644
--- a/simple-mind-map/src/plugins/OuterFrame.js
+++ b/simple-mind-map/src/plugins/OuterFrame.js
@@ -242,7 +242,7 @@ class OuterFrame {
       ...styleConfig,
       strokeDasharray: 'none'
     })
-    const text = this.getText(firstNode)
+    const text = this.getText(firstNode) || this.mindMap.opt.defaultOuterFrameText
     this.renderText(text, el, textNode, node, range)
   }