diff --git a/Project/GNU/CLI/test/test1.txt b/Project/GNU/CLI/test/test1.txt
index 770e96c8..2993471a 100644
--- a/Project/GNU/CLI/test/test1.txt
+++ b/Project/GNU/CLI/test/test1.txt
@@ -210,6 +210,7 @@ Formats/DPX/Flavors/Y_10_FilledB_BE/Y_10_FilledB_BE_Modified_9x4_Scanity.dpx
 Formats/DPX/Flavors/Y_12_Packed_BE/086400.dpx pass
 Formats/DPX/Flavors/Y_16_FilledA_BE/0000001.dpx pass
 Formats/DPX/Flavors/Y_16_Packed_BE/FFmpeg_gray16be.dpx pass
+Formats/DPX/Flavors/Y_16_Packed_BE/pack3.dpx pass
 Formats/DPX/Flavors/Y_16_Packed_LE/FFmpeg_gray16le.dpx pass
 Formats/DPX/Conformance/0004_OffsetToImageData/0004_OffsetToImageData_000000.dpx fail
 Formats/DPX/Conformance/0008_VersionNumber/0008_VersionNumber_null.dpx pass
diff --git a/Source/Lib/Uncompressed/DPX/DPX.cpp b/Source/Lib/Uncompressed/DPX/DPX.cpp
index 0cd7fb2a..36e2a7e1 100644
--- a/Source/Lib/Uncompressed/DPX/DPX.cpp
+++ b/Source/Lib/Uncompressed/DPX/DPX.cpp
@@ -96,6 +96,7 @@ static const char* MessageText[] =
     "ditto key",
     "ditto key is set to \"same as the previous frame\" but header data differs",
     "number of image elements",
+    "packing field value",
 };
 
 enum code : uint8_t
@@ -106,6 +107,7 @@ enum code : uint8_t
     DittoKey,
     DittoKey_NotSame,
     NumberOfElements,
+    Packing,
     Max
 };
 
@@ -134,6 +136,7 @@ enum class packing : uint8_t
     Packed,
     FilledA,
     FilledB,
+    Pack3,
 };
 enum flags : uint8_t
 {
@@ -223,6 +226,8 @@ struct dpx_also DPX_Also[] =
     { { colorspace::Y        ,  8, endianness::BE, packing::FilledA }, dpx::flavor::Raw_Y_8                   },
     { { colorspace::Y        , 16, endianness::LE, packing::FilledA }, dpx::flavor::Raw_Y_16_LE               },
     { { colorspace::Y        , 16, endianness::BE, packing::FilledA }, dpx::flavor::Raw_Y_16_BE               },
+    { { colorspace::Y        , 16, endianness::LE, packing::Pack3   }, dpx::flavor::Raw_Y_16_LE               },
+    { { colorspace::Y        , 16, endianness::BE, packing::Pack3   }, dpx::flavor::Raw_Y_16_BE               },
 };
 
 //***************************************************************************
@@ -670,7 +675,10 @@ void dpx::ConformanceCheck()
     bool HasEncoding = false;
     for (uint16_t i = 0; i < NumberOfElements; i++)
     {
-        uint32_t Encoding = Get_X4();
+        uint16_t Packing = Get_X2();
+        if (Packing > (uint16_t)packing::FilledB)
+            Invalid(invalid::Packing);
+        uint16_t Encoding = Get_X2();
         if (!HasEncoding && Encoding)
             HasEncoding = true;
         uint32_t OffsetToData = Get_X4();