diff --git a/Editor/Util.cs b/Editor/Util.cs
index b144ad6..e0b3c58 100644
--- a/Editor/Util.cs
+++ b/Editor/Util.cs
@@ -1095,8 +1095,9 @@ public static bool AssetPathExists(string assetPath)
         public static bool AssetPathIsEmpty(string assetPath)
         {
             const string emptyGuid = "00000000000000000000000000000000";
+            string pathGUID = AssetDatabase.AssetPathToGUID(assetPath);
 
-            return AssetDatabase.AssetPathToGUID(assetPath).Equals(emptyGuid);
+            return (pathGUID.Equals(emptyGuid) || string.IsNullOrEmpty(pathGUID));
         }
 
         public static bool HasMaterialKeywords(GameObject obj, params string[] keywords)