@ -577,7 +577,7 @@ namespace ImageSharp.Formats
{
TPixel color = default(TPixel);
BufferSpan<TPixel> pixelBuffer = pixels.GetRowSpan(this.currentRow);
BufferSpan<byte> scanlineBuffer = new BufferSpan<byte>(defilteredScanline);
BufferSpan<byte> scanlineBuffer = new BufferSpan<byte>(defilteredScanline, 1);
switch (this.PngColorType)
case PngColorType.Grayscale: