diff --git a/libvips/colour/CMYK2XYZ.c b/libvips/colour/CMYK2XYZ.c
index 6bbe8e6f..b3b2b7f0 100644
--- a/libvips/colour/CMYK2XYZ.c
+++ b/libvips/colour/CMYK2XYZ.c
@@ -84,6 +84,7 @@ vips_CMYK2XYZ_build( VipsObject *object )
 
 	out = vips_image_new();
 	g_object_set( object, "out", out, NULL ); 
+    printf("%d\n", vips__profile_set( t[0], "cmyk" ));
 
 	if( vips_copy( CMYK2XYZ->in, &t[0], NULL ) ||
 		vips__profile_set( t[0], "cmyk" ) ||