diff --git a/Assets/NavMeshComponents/Scripts/NavMeshSurface.cs b/Assets/NavMeshComponents/Scripts/NavMeshSurface.cs
index 10ddf35..218759f 100644
--- a/Assets/NavMeshComponents/Scripts/NavMeshSurface.cs
+++ b/Assets/NavMeshComponents/Scripts/NavMeshSurface.cs
@@ -368,12 +368,12 @@ bool UnshareNavMeshAsset()
                 return false;
 
             // Prefab parent owns the asset reference
-            var prefabType = UnityEditor.PrefabUtility.GetPrefabType(this);
-            if (prefabType == UnityEditor.PrefabType.Prefab)
+            var prefabType = UnityEditor.PrefabUtility.GetPrefabAssetType(this);
+            if (prefabType != UnityEditor.PrefabAssetType.NotAPrefab)
                 return false;
 
             // An instance can share asset reference only with its prefab parent
-            var prefab = UnityEditor.PrefabUtility.GetPrefabParent(this) as NavMeshSurface;
+            var prefab = UnityEditor.PrefabUtility.GetCorrespondingObjectFromSource(this) as NavMeshSurface;
             if (prefab != null && prefab.navMeshData == navMeshData)
                 return false;