diff --git a/src/GeoJsonPages/Semantic/SubObjectBuilder.php b/src/GeoJsonPages/Semantic/SubObjectBuilder.php
index c36c07a7..af3f925f 100644
--- a/src/GeoJsonPages/Semantic/SubObjectBuilder.php
+++ b/src/GeoJsonPages/Semantic/SubObjectBuilder.php
@@ -22,7 +22,7 @@ public function getSubObjectsFromGeoJson( string $jsonString ) {
 		try {
 			$geoJson = GeoJson::jsonUnserialize( $json );
 		}
-		catch ( UnserializationException ) {
+		catch ( UnserializationException $e ) {
 			// TODO: log warning
 			return [];
 		}