diff --git a/ChangeLog b/ChangeLog
index e27c6ffd..9b69524c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -69,8 +69,9 @@
 - added im_copy_file()
 - added im_insertplaceset()
 - im_insertplace() allows small to be outside big
-- added im__colour_binary(), colour ops now work on any image format
+- added im__colour_difference(), colour ops now work on any image format
 - added im_col_display_get_table(), so display tables are now shared by name
+- added im__colour_unary()
 
 25/3/09 started 7.18.0
 - revised version numbers