1 files changed, 2 insertions, 0 deletions

diff --git a/src/buffer.c b/src/buffer.c
index b3bcb68c281..2ca4332bca2 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -5782,6 +5782,8 @@ An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
 was modified between BEG and END.  PROPERTY is the property name,
 and VALUE is the old value.
 
+An entry (FUN-NAME . ARGS) means undo the change with (apply FUN-NAME ARGS).
+
 An entry (MARKER . DISTANCE) indicates that the marker MARKER
 was adjusted in position by the offset DISTANCE (an integer).