diff --git a/docs/examples-dist/popup.vue b/docs/examples-dist/popup.vue
index 6ba4e8536..3ee9101d7 100644
--- a/docs/examples-dist/popup.vue
+++ b/docs/examples-dist/popup.vue
@@ -1,6 +1,6 @@
 <template><section class="demo-popup"><h1 class="demo-title">popup</h1><example-block title="基础用法">
                 <zan-button block="" @click="popupShow1 = true">从中间弹出popup</zan-button>
-<zan-popup v-model="popupShow1" class="zan-popup-1">
+<zan-popup v-model="popupShow1" class="zan-popup-1" :lock-on-scroll="true">
   从中间弹出popup
 </zan-popup>
 
diff --git a/packages/dialog/src/dialog.vue b/packages/dialog/src/dialog.vue
index b91ea033c..47b8f1cbb 100644
--- a/packages/dialog/src/dialog.vue
+++ b/packages/dialog/src/dialog.vue
@@ -68,7 +68,7 @@ export default {
 
       if (this.lockOnScroll) {
         setTimeout(() => {
-          if (this.modal && this.bodyOverflow !== 'hidden') {
+          if (this.overlay && this.bodyOverflow !== 'hidden') {
             document.body.style.overflow = this.bodyOverflow;
           }
           this.bodyOverflow = null;