diff --git a/lib/ClusteredMapView.js b/lib/ClusteredMapView.js
index 9e44320..0d02a3d 100644
--- a/lib/ClusteredMapView.js
+++ b/lib/ClusteredMapView.js
@@ -143,10 +143,10 @@ const ClusteredMapView = forwardRef(
         }
         updateMarkers(markers);
         onMarkersChange(markers);
-        onRegionChangeComplete(region, markers);
+        onRegionChangeComplete && onRegionChangeComplete(region, markers);
         updateRegion(region);
       } else {
-        onRegionChangeComplete(region);
+        onRegionChangeComplete && onRegionChangeComplete(region);
       }
     };
 
@@ -177,7 +177,7 @@ const ClusteredMapView = forwardRef(
         ref={(map) => {
           mapRef.current = map;
           if (ref) ref.current = map;
-          restProps.mapRef(map);
+          restProps.mapRef && restProps.mapRef(map);
         }}
         onRegionChangeComplete={_onRegionChangeComplete}
       >