diff --git a/leaflet-markercluster/index.d.ts b/leaflet-markercluster/index.d.ts
index ab8b6d9431..b1d4649b33 100644
--- a/leaflet-markercluster/index.d.ts
+++ b/leaflet-markercluster/index.d.ts
@@ -105,7 +105,7 @@ declare namespace L {
         /*
         * Function used to create the cluster icon
         */
-        iconCreateFunction?: ((cluster: L.MarkerCluster) => L.Icon);
+        iconCreateFunction?: ((cluster: L.MarkerCluster) => L.BaseIcon);
 
         /*
         * Boolean to split the addLayers processing in to small intervals so that the page does not freeze.
diff --git a/leaflet-markercluster/leaflet-markercluster-tests.ts b/leaflet-markercluster/leaflet-markercluster-tests.ts
index 346239f836..ac607f1f5d 100644
--- a/leaflet-markercluster/leaflet-markercluster-tests.ts
+++ b/leaflet-markercluster/leaflet-markercluster-tests.ts
@@ -28,6 +28,10 @@ markerClusterGroupOptions = {
     chunkDelay: 100
 }
 
+markerClusterGroupOptions.iconCreateFunction = (cluster: L.MarkerCluster) => {
+    return L.divIcon();
+};
+
 let markerClusterGroup: L.MarkerClusterGroup;
 markerClusterGroup = L.markerClusterGroup();
 markerClusterGroup = L.markerClusterGroup(markerClusterGroupOptions);