diff --git a/dist/vue.runtime.esm.js b/dist/vue.runtime.esm.js
index e475f279ab4..289ebe24d37 100644
--- a/dist/vue.runtime.esm.js
+++ b/dist/vue.runtime.esm.js
@@ -5864,7 +5864,7 @@ function createPatchFunction (backend) {
   }
 
   function emptyNodeAt (elm) {
-    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+    return new VNode((typeof nodeOps.tagName(elm) == "string") ? nodeOps.tagName(elm).toLowerCase() : "", {}, [], undefined, elm)
   }
 
   function createRmCb (childElm, listeners) {
diff --git a/packages/weex-vue-framework/factory.js b/packages/weex-vue-framework/factory.js
index 4cb547b5250..1153dd363c4 100644
--- a/packages/weex-vue-framework/factory.js
+++ b/packages/weex-vue-framework/factory.js
@@ -5899,7 +5899,7 @@ function createPatchFunction (backend) {
   }
 
   function emptyNodeAt (elm) {
-    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+    return new VNode((typeof nodeOps.tagName(elm) == "string") ? nodeOps.tagName(elm).toLowerCase() : "", {}, [], undefined, elm)
   }
 
   function createRmCb (childElm, listeners) {
diff --git a/src/core/vdom/patch.js b/src/core/vdom/patch.js
index 2052df913b3..c19089f4e58 100644
--- a/src/core/vdom/patch.js
+++ b/src/core/vdom/patch.js
@@ -83,7 +83,7 @@ export function createPatchFunction (backend) {
   }
 
   function emptyNodeAt (elm) {
-    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+    return new VNode((typeof nodeOps.tagName(elm) == "string") ? nodeOps.tagName(elm).toLowerCase() : "", {}, [], undefined, elm)
   }
 
   function createRmCb (childElm, listeners) {