--- a/coders/pdb.c	Wed Apr 10 11:27:35 2019 -0500
+++ b/coders/pdb.c	Wed Apr 10 20:48:28 2019 -0500
@@ -30,6 +30,13 @@
 %
 %
 */
+/*
+  Some information on this format may be found at
+  http://fileformats.archiveteam.org/wiki/Palm_Database_ImageViewer
+
+  Round-trip tests do not pass so this format is not included in the
+  test suite.
+*/
 
 /*
   Include declarations.
@@ -733,6 +740,7 @@
   entry->magick=(MagickHandler) IsPDB;
   entry->description="Palm Database ImageViewer Format";
   entry->module="PDB";
+  entry->coder_class=UnstableCoderClass;
   (void) RegisterMagickInfo(entry);
 }
 
@@ -842,7 +850,7 @@
     status;
 
   size_t
-        packets;
+    packets;
 
   unsigned long
     literal,
@@ -867,6 +875,7 @@
   if (status == False)
     ThrowPDBWriterException(FileOpenError,UnableToOpenFile,image);
   (void) TransformColorspace(image,RGBColorspace);
+  (void) SetImageType(image,GrayscaleType);
   bits_per_pixel=image->depth;
   if (GetImageType(image,&image->exception) == BilevelType)
     bits_per_pixel=1;
@@ -939,7 +948,7 @@
   if (buffer == (unsigned char *) NULL)
     ThrowPDBWriterException(ResourceLimitWarning,MemoryAllocationFailed,image);
   (void) memset(buffer,0,512);
-  packet_size=image->depth > 8 ? 2: 1;
+  packet_size=bits_per_pixel > 8 ? 2: 1;
   scanline=MagickAllocateArray(unsigned char *,image->columns,packet_size);
   if (scanline == (unsigned char *) NULL)
     ThrowPDBWriterException(ResourceLimitWarning,MemoryAllocationFailed,image);
@@ -956,7 +965,7 @@
   {
     if (!AcquireImagePixels(image,0,y,image->columns,1,&image->exception))
       break;
-    (void) ExportImagePixelArea(image,GrayQuantum,image->depth,scanline,0,0);
+    (void) ExportImagePixelArea(image,GrayQuantum,bits_per_pixel,scanline,0,0);
     for (x=0; x < pdb_image.width; x++)
     {
       if (x < (long) image->columns)
