diff --git a/src/dialog/dialog.tsx b/src/dialog/dialog.tsx
index 0cd0663b7..502f09037 100644
--- a/src/dialog/dialog.tsx
+++ b/src/dialog/dialog.tsx
@@ -133,7 +133,7 @@ export default mixins(ActionMixin, getConfigReceiverMixins<Vue, DialogConfig>('d
     if (this.draggable) {
       window.addEventListener('resize', throttle(this.resizeAdjustPosition, 1000));
     }
-    if (this.visible) {
+    if (this.visible && this.isModal && this.preventScrollThrough) {
       addClass(document.body, lockClass);
     }
   },