diff --git a/ChangeLog b/ChangeLog
index 0147cc94..3765cef1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2010-12-14  Lee Howard <faxguy@howardsilvan.com>
+
+	* libtiff/tif_dirread.c: tolerate some cases where
+	FIELD_COLORMAP is missing
+	http://bugzilla.maptools.org/show_bug.cgi?id=2189
+
 2010-12-14  Lee Howard <faxguy@howardsilvan.com>
 
 	* libtiff/tif_read.c: change read_ahead to tmsize_t
diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c
index fba14a23..fc29da82 100644
--- a/libtiff/tif_dirread.c
+++ b/libtiff/tif_dirread.c
@@ -1,4 +1,4 @@
-/* $Id: tif_dirread.c,v 1.164 2010-12-14 03:03:24 faxguy Exp $ */
+/* $Id: tif_dirread.c,v 1.165 2010-12-15 01:05:02 faxguy Exp $ */
 
 /*
  * Copyright (c) 1988-1997 Sam Leffler
@@ -3845,8 +3845,14 @@ TIFFReadDirectory(TIFF* tif)
 	 */
 	if (tif->tif_dir.td_photometric == PHOTOMETRIC_PALETTE &&
 	    !TIFFFieldSet(tif, FIELD_COLORMAP)) {
-		MissingRequired(tif, "Colormap");
-		goto bad;
+		if ( tif->tif_dir.td_bitspersample>=8 && tif->tif_dir.td_samplesperpixel==3)
+			tif->tif_dir.td_photometric = PHOTOMETRIC_RGB;
+		else if (tif->tif_dir.td_bitspersample>=8)
+			tif->tif_dir.td_photometric = PHOTOMETRIC_MINISBLACK;
+		else {
+			MissingRequired(tif, "Colormap");
+			goto bad;
+		}
 	}
 	/*
 	 * OJPEG hack: