diff --git a/ChangeLog.txt b/ChangeLog.txt
index b552a65..c647607 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -8,6 +8,9 @@ Date: unreleased
 - Added support for MS Excel's "sep=" to detect the
   delimiter (Issue #60).
 
+- MIME: output() sends correct MIME type to browser
+  if the separator is a tab tab (Issue #79)
+
 - Added support for mb_convert_encoding() instead of
   iconv() - see issue #109