diff --git a/Packages/com.github.homuler.mediapipe/Runtime/Scripts/PInvoke/NativeMethods/Framework/Format/Image_Safe.cs b/Packages/com.github.homuler.mediapipe/Runtime/Scripts/PInvoke/NativeMethods/Framework/Format/Image_Safe.cs
index 5f09657ec..e0de89126 100644
--- a/Packages/com.github.homuler.mediapipe/Runtime/Scripts/PInvoke/NativeMethods/Framework/Format/Image_Safe.cs
+++ b/Packages/com.github.homuler.mediapipe/Runtime/Scripts/PInvoke/NativeMethods/Framework/Format/Image_Safe.cs
@@ -36,7 +36,6 @@ internal static partial class SafeNativeMethods
 
     #region PixelWriteLock
     [Pure, DllImport(MediaPipeLibrary, ExactSpelling = true)]
-    [return: MarshalAs(UnmanagedType.I1)]
     public static extern IntPtr mp_PixelWriteLock__Pixels(IntPtr pixelWriteLock);
     #endregion
   }