diff --git a/AssetStudio/Classes/PPtr.cs b/AssetStudio/Classes/PPtr.cs
index 6466a42..9bec685 100644
--- a/AssetStudio/Classes/PPtr.cs
+++ b/AssetStudio/Classes/PPtr.cs
@@ -58,7 +58,7 @@ namespace AssetStudio
         public bool TryGet(out T result, SerializedFile assetsFile = null)
         {
             _assetsFile = _assetsFile ?? assetsFile;
-            if (TryGetAssetsFile(out var sourceFile))
+            if (!IsNull && TryGetAssetsFile(out var sourceFile))
             {
                 if (sourceFile.ObjectsDic.TryGetValue(m_PathID, out var obj))
                 {
@@ -77,7 +77,7 @@ namespace AssetStudio
         public bool TryGet<T2>(out T2 result, SerializedFile assetsFile = null) where T2 : Object
         {
             _assetsFile = _assetsFile ?? assetsFile;
-            if (TryGetAssetsFile(out var sourceFile))
+            if (!IsNull && TryGetAssetsFile(out var sourceFile))
             {
                 if (sourceFile.ObjectsDic.TryGetValue(m_PathID, out var obj))
                 {
diff --git a/AssetStudio/Classes/Sprite.cs b/AssetStudio/Classes/Sprite.cs
index 6f5eaa4..2ca4846 100644
--- a/AssetStudio/Classes/Sprite.cs
+++ b/AssetStudio/Classes/Sprite.cs
@@ -99,10 +99,7 @@ namespace AssetStudio
             var version = reader.version;
 
             texture = new PPtr<Texture2D>(reader);
-            if (version >= (5, 2)) //5.2 and up
-            {
-                alphaTexture = new PPtr<Texture2D>(reader);
-            }
+            alphaTexture = version >= (5, 2) ? new PPtr<Texture2D>(reader) : new PPtr<Texture2D>(); //5.2 and up
 
             if (version >= 2019) //2019 and up
             {