diff --git a/Sources/GoogleMapsUtilsObjC/include/GMUDefaultClusterRenderer.m b/Sources/GoogleMapsUtilsObjC/include/GMUDefaultClusterRenderer.m
index 1906828b..e1d3d8e2 100644
--- a/Sources/GoogleMapsUtilsObjC/include/GMUDefaultClusterRenderer.m
+++ b/Sources/GoogleMapsUtilsObjC/include/GMUDefaultClusterRenderer.m
@@ -284,7 +284,7 @@ - (void)renderCluster:(id<GMUCluster>)cluster animated:(BOOL)animated {
   } else {
     for (id<GMUClusterItem> item in cluster.items) {
       GMSMarker *marker;
-      if ([item class] == [GMSMarker class]) {
+      if ([item isKindOfClass:[GMSMarker class]]) {
         marker = (GMSMarker<GMUClusterItem> *)item;
         marker.map = _mapView;
       } else {