diff --git a/src/ImageProcessorCore/Formats/Jpg/JpegConstants.cs b/src/ImageProcessorCore/Formats/Jpg/JpegConstants.cs
index 4df086f292..7ce8865783 100644
--- a/src/ImageProcessorCore/Formats/Jpg/JpegConstants.cs
+++ b/src/ImageProcessorCore/Formats/Jpg/JpegConstants.cs
@@ -205,5 +205,26 @@ namespace ImageProcessorCore.Formats
             /// </summary>
             public const byte APP15 = 0xef;
         }
+
+        /// <summary>
+        /// Describes Adobe specific markers <see href="http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/JPEG.html#Adobe"/>
+        /// </summary>
+        internal static class Adobe
+        {
+            /// <summary>
+            /// The color transform is unknown.(RGB or CMYK) 
+            /// </summary>
+            public const int ColorTransformUnknown = 0;
+
+            /// <summary>
+            /// The color transform is YCbCr (luminance, red chroma, blue chroma)
+            /// </summary>
+            public const int ColorTransformYCbCr = 1;
+
+            /// <summary>
+            /// The color transform is YCCK (luminance, red chroma, blue chroma, keyline)
+            /// </summary>
+            public const int ColorTransformYcck = 2;
+        }
     }
 }
\ No newline at end of file
diff --git a/src/ImageProcessorCore/Formats/Jpg/JpegDecoderCore.cs.REMOVED.git-id b/src/ImageProcessorCore/Formats/Jpg/JpegDecoderCore.cs.REMOVED.git-id
index f10210ac05..1329746e8b 100644
--- a/src/ImageProcessorCore/Formats/Jpg/JpegDecoderCore.cs.REMOVED.git-id
+++ b/src/ImageProcessorCore/Formats/Jpg/JpegDecoderCore.cs.REMOVED.git-id
@@ -1 +1 @@
-8ce31914f581080b90c50b6a6529db20a29e7551
\ No newline at end of file
+d6958d9584977251f1a5b84a877bb4c3a1336135
\ No newline at end of file
diff --git a/tests/ImageProcessorCore.Tests/FileTestBase.cs b/tests/ImageProcessorCore.Tests/FileTestBase.cs
index a0f447510a..0d9622701d 100644
--- a/tests/ImageProcessorCore.Tests/FileTestBase.cs
+++ b/tests/ImageProcessorCore.Tests/FileTestBase.cs
@@ -23,6 +23,7 @@ namespace ImageProcessorCore.Tests
             //TestImages.Png.Pd,
             //TestImages.Jpg.Floorplan, // Perf: Enable for local testing only
             TestImages.Jpg.Calliphora,
+            //TestImages.Jpg.Cmyk, // Perf: Enable for local testing only
             //TestImages.Jpg.Turtle,
             //TestImages.Jpg.Fb, // Perf: Enable for local testing only
             //TestImages.Jpg.Progress, // Perf: Enable for local testing only