diff --git a/Editor/Cluster_Drawer.cs b/Editor/Cluster_Drawer.cs
index 2a15872..d33bbf1 100644
--- a/Editor/Cluster_Drawer.cs
+++ b/Editor/Cluster_Drawer.cs
@@ -37,13 +37,18 @@ namespace NanoBrain.Unity {
         }
 
         private void InstantiateCluster(SerializedProperty property, ClusterView clusterView) {
-            if (property == null || property.serializedObject == null || clusterView.initialized)
+            if (property == null || clusterView.initialized)
                 return;
 
-            SerializedProperty prefabProp = property.FindPropertyRelative(nameof(Cluster.prefab));
-            UnityEngine.Object targetObject = property.serializedObject.targetObject;
+            SerializedObject serializedObject = property.serializedObject;
+            if (serializedObject == null)
+                return;                
+
+            UnityEngine.Object targetObject = serializedObject.targetObject;
             if (targetObject == null)
                 return;
+                
+            SerializedProperty prefabProp = property.FindPropertyRelative(nameof(Cluster.prefab));
 
             Debug.Log($"Instantiate new Cluster for {targetObject.name}");