diff --git a/src/index.jsx b/src/index.jsx
index 39c1505..806196f 100644
--- a/src/index.jsx
+++ b/src/index.jsx
@@ -234,6 +234,8 @@ class LazyLoad extends Component {
     if (scrollContainer) {
       if (isString(scrollContainer)) {
         scrollport = scrollport.document.querySelector(scrollContainer);
+      } else {
+        scrollport = scrollContainer;
       }
     }
     const needResetFinalLazyLoadHandler =