diff --git a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
index bc3a5f1b56..9c66cfe0c3 100644
--- a/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
+++ b/src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs
@@ -679,7 +679,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
                     chrominanceQuantTable = metadata.ChromaQuantizationTable;
                 }
 
-                this.subsample = chromaQuality >= 91 ? JpegSubsample.Ratio444 : JpegSubsample.Ratio420;
+                if (!this.subsample.HasValue)
+                {
+                    this.subsample = chromaQuality >= 91 ? JpegSubsample.Ratio444 : JpegSubsample.Ratio420;
+                }
             }
         }
     }