diff --git a/src/components/map/FeatureLayerPopup.jsx b/src/components/map/FeatureLayerPopup.jsx
index 516fc92..e9b98d4 100644
--- a/src/components/map/FeatureLayerPopup.jsx
+++ b/src/components/map/FeatureLayerPopup.jsx
@@ -29,7 +29,8 @@ function groupFeaturesBySourceLayer(features) {
 class FeatureLayerPopup extends React.Component {
   static propTypes = {
     onLayerSelect: PropTypes.func.isRequired,
-    features: PropTypes.array
+    features: PropTypes.array,
+    zoom: PropTypes.number,
   }
 
   render() {