diff --git a/Assets/YooAsset/Runtime/PackageSystem/Operations/Internal/DeserializeManifestOperation.cs b/Assets/YooAsset/Runtime/PackageSystem/Operations/Internal/DeserializeManifestOperation.cs
index bca8586..14fffae 100644
--- a/Assets/YooAsset/Runtime/PackageSystem/Operations/Internal/DeserializeManifestOperation.cs
+++ b/Assets/YooAsset/Runtime/PackageSystem/Operations/Internal/DeserializeManifestOperation.cs
@@ -142,9 +142,9 @@ namespace YooAsset
 								Manifest.AssetPathMapping1.Add(location, packageAsset.AssetPath);
 
 							// 添加无后缀名路径的映射
-							if (Path.HasExtension(location))
+							string locationWithoutExtension = Path.ChangeExtension(location, null);
+							if (!ReferenceEquals(location, locationWithoutExtension))
 							{
-								string locationWithoutExtension = PathUtility.RemoveExtension(location);
 								if (Manifest.AssetPathMapping1.ContainsKey(locationWithoutExtension))
 									YooLogger.Warning($"Location have existed : {locationWithoutExtension}");
 								else