diff --git a/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFCustom.java b/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFCustom.java
index d62652a2..3a93895a 100644
--- a/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFCustom.java
+++ b/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFCustom.java
@@ -52,6 +52,10 @@ interface TIFFCustom {
     int COMPRESSION_JPEG2000 = 34712;
     // TODO: Aperio SVS JPEG2000: 33003 (YCbCr) and 33005 (RGB), see http://openslide.org/formats/aperio/
 
+    // PIXTIFF aka DELL PixTools, see https://community.emc.com/message/515755#515755
+    /** PIXTIFF proprietary ZIP compression, identical to Deflate/ZLib. */
+    int COMPRESSION_PIXTIFF_ZIP = 50013;
+
     int PHOTOMETRIC_LOGL = 32844;
     int PHOTOMETRIC_LOGLUV = 32845;
 
diff --git a/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFImageReader.java b/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFImageReader.java
index 46ff9a4d..bb3324c9 100755
--- a/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFImageReader.java
+++ b/imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFImageReader.java
@@ -948,20 +948,20 @@ public final class TIFFImageReader extends ImageReaderBase {
         Boolean needsCSConversion = null;
 
         switch (compression) {
-            // TIFF Baseline
             case TIFFBaseline.COMPRESSION_NONE:
                 // No compression
-            case TIFFExtension.COMPRESSION_DEFLATE:
-                // 'PKZIP-style' Deflate
             case TIFFBaseline.COMPRESSION_PACKBITS:
                 // PackBits
             case TIFFExtension.COMPRESSION_LZW:
                 // LZW
             case TIFFExtension.COMPRESSION_ZLIB:
                 // 'Adobe-style' Deflate
+            case TIFFExtension.COMPRESSION_DEFLATE:
+                // 'PKZIP-style' Deflate
+            case TIFFCustom.COMPRESSION_PIXTIFF_ZIP:
+                // PIXTIFF proprietary 'ZIP' compression, same as Deflate
             case TIFFBaseline.COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE:
                 // CCITT modified Huffman
-                // Additionally, the specification defines these values as part of the TIFF extensions:
             case TIFFExtension.COMPRESSION_CCITT_T4:
                 // CCITT Group 3 fax encoding
             case TIFFExtension.COMPRESSION_CCITT_T6:
@@ -2068,6 +2068,7 @@ public final class TIFFImageReader extends ImageReaderBase {
             case TIFFExtension.COMPRESSION_ZLIB:
             case TIFFExtension.COMPRESSION_DEFLATE:
                 // TIFF specification, supplement 2 says ZLIB (8) and DEFLATE (32946) algorithms are identical
+            case TIFFCustom.COMPRESSION_PIXTIFF_ZIP:
                 return new InflaterInputStream(stream, new Inflater(), 1024);
             case TIFFBaseline.COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE:
             case TIFFExtension.COMPRESSION_CCITT_T4: