Use existing field

8 years ago · 9fbc8ed3df
1 changed files with 1 additions and 1 deletions
--- a/src/ImageSharp/Formats/Png/PngEncoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@ -785,7 +785,7 @@ namespace SixLabors.ImageSharp.Formats.Png
            else if (pngMetaData.ColorType.Equals(PngColorType.Grayscale))
            {
                Span<byte> alpha = this.buffer.AsSpan();
-                if (pngMetaData.TransparentGray16.HasValue && this.bitDepth == 16)
+                if (pngMetaData.TransparentGray16.HasValue && this.use16Bit)
                {
                    BinaryPrimitives.WriteUInt16LittleEndian(alpha, pngMetaData.TransparentGray16.Value.PackedValue);
                    this.WriteChunk(stream, PngChunkType.Transparency, this.buffer, 0, 2);