diff --git a/src/FillSpace.jsx b/src/FillSpace.jsx
index 6665151..f05e3b5 100644
--- a/src/FillSpace.jsx
+++ b/src/FillSpace.jsx
@@ -445,6 +445,7 @@ class FillSpace extends Component {
       items,
       renderItem,
       header,
+      headerItem,
       sx,
       ...rest
     } = this.props;