diff --git a/Assets/Editor Toolbox/Runtime/Serialization/SerializedDirectory.cs b/Assets/Editor Toolbox/Runtime/Serialization/SerializedDirectory.cs
index 2b7df920..ecd11ece 100644
--- a/Assets/Editor Toolbox/Runtime/Serialization/SerializedDirectory.cs	
+++ b/Assets/Editor Toolbox/Runtime/Serialization/SerializedDirectory.cs	
@@ -16,7 +16,7 @@ public class SerializedDirectory : ISerializationCallbackReceiver
         [SerializeField, Disable]
         private string path;
 
-//#if UNITY_EDITOR
+#if UNITY_EDITOR
         internal static bool IsAssetValid(DefaultAsset asset, out string path)
         {
             path = asset != null ? AssetDatabase.GetAssetPath(asset) : null;
@@ -34,7 +34,7 @@ internal static bool IsAssetValid(DefaultAsset asset, out string path)
 
             return false;
         }
-//#endif
+#endif
         void ISerializationCallbackReceiver.OnAfterDeserialize()
         { }