diff --git a/ChangeLog b/ChangeLog
index e5151c83..23c8a3c2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,9 @@ What's New for OpenJPEG
 ! : changed
 + : added
 
+January 20, 2010
+! [FOD] Created a new constant in openjpeg.h to differentiate the case when the colorspace is not supported by the library and when it is not specified in the codestream. Suggested by Matteo Italia.
+
 November 5, 2009
 * [antonin] fixed MCT check bug in t1_getwmsedec. See http://groups.google.com/group/openjpeg/browse_thread/thread/d9d96dd4ec3e7443 for info.
 
diff --git a/libopenjpeg/openjpeg.h b/libopenjpeg/openjpeg.h
index ffcaacaf..288f788e 100644
--- a/libopenjpeg/openjpeg.h
+++ b/libopenjpeg/openjpeg.h
@@ -147,7 +147,8 @@ typedef enum PROG_ORDER {
 Supported image color spaces
 */
 typedef enum COLOR_SPACE {
-	CLRSPC_UNKNOWN = -1,	/**< place-holder */
+	CLRSPC_UNKNOWN = -1,	/**< not supported by the library */
+	CLRSPC_UNSPECIFIED = 0, /**< not specified in the codestream */ 
 	CLRSPC_SRGB = 1,		/**< sRGB */
 	CLRSPC_GRAY = 2,		/**< grayscale */
 	CLRSPC_SYCC = 3			/**< YUV */