diff --git a/include/vips/VImage.h b/include/vips/VImage.h
index 060eb392..80f0d3c7 100644
--- a/include/vips/VImage.h
+++ b/include/vips/VImage.h
@@ -176,7 +176,8 @@ public:
 		LABPACK               = 2,
 		LABPACK_COMPRESSED    = 3,
 		RGB_COMPRESSED        = 4,
-		LUM_COMPRESSED        = 5
+		LUM_COMPRESSED        = 5,
+		RAD        	      = 6
 	};
 
 	// Compression type
diff --git a/include/vips/vips.h b/include/vips/vips.h
index f938a955..161caf31 100644
--- a/include/vips/vips.h
+++ b/include/vips/vips.h
@@ -466,7 +466,7 @@ typedef struct {
 
 #define IM_CODING_NONE			(0)			
 #define IM_CODING_LABQ			(2)				
-#define IM_CODING_RAD			(4)				
+#define IM_CODING_RAD			(6)				
 
 #define IM_IMAGE_SIZEOF_ELEMENT(I)	((I)->Bbits >> 3)
 #define IM_IMAGE_SIZEOF_PEL(I) 	\
diff --git a/libsrc/iofuncs/im_printdesc.c b/libsrc/iofuncs/im_printdesc.c
index 25df9218..f8960965 100644
--- a/libsrc/iofuncs/im_printdesc.c
+++ b/libsrc/iofuncs/im_printdesc.c
@@ -119,6 +119,8 @@ static const char *im_Coding[] = {
 	"COLQUANT8", 
 	"IM_CODING_LABQ", 
 	"IM_CODING_LABQ_COMPRESSED",
+	"RGB_COMPRESSED",
+	"LUM_COMPRESSED",
 	"IM_CODING_RAD"
 };