Index: src/main/java/org/apache/pdfbox/pdmodel/graphics/xobject/PDCcitt.java
===================================================================
--- src/main/java/org/apache/pdfbox/pdmodel/graphics/xobject/PDCcitt.java	(revision 1406610)
+++ src/main/java/org/apache/pdfbox/pdmodel/graphics/xobject/PDCcitt.java	(working copy)
@@ -16,9 +16,12 @@
  */
 package org.apache.pdfbox.pdmodel.graphics.xobject;
 
+import java.awt.Transparency;
 import java.awt.image.BufferedImage;
 import java.awt.image.DataBufferByte;
+import java.awt.image.IndexColorModel;
 import java.awt.image.WritableRaster;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -26,6 +29,8 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import javax.imageio.ImageIO;
+
 import org.apache.pdfbox.cos.COSArray;
 import org.apache.pdfbox.cos.COSBase;
 import org.apache.pdfbox.cos.COSDictionary;
@@ -159,7 +164,26 @@
             //So a safe but slower approach was taken.
             invertBitmap(bufferData);
         }
-        return image;
+        
+        /*
+         * If we have an image mask we need to add an alpha channel to the data
+         */
+        if(hasMask())
+        {
+	        byte map[] = new byte[] {(byte)0x00, (byte)0xff};
+	    	IndexColorModel  cm = new IndexColorModel(1, map.length, map, map, map, Transparency.OPAQUE);
+	    	 raster = cm.createCompatibleWritableRaster( image.getWidth(), image.getHeight() );
+	         buffer = (DataBufferByte)raster.getDataBuffer();
+	        bufferData = buffer.getData();
+	
+	        byte array[] = ((DataBufferByte)image.getData().getDataBuffer()).getData();
+	        System.arraycopy( array, 0,bufferData, 0,
+	                (array.length<bufferData.length?array.length: bufferData.length) );
+	        BufferedImage indexed = new BufferedImage(cm, raster, false, null);
+	        image = indexed;
+        }
+        
+        return applyMasks(image);
     }
 
     private void invertBitmap(byte[] bufferData)