diff --git a/runtime/doc/usr_toc.txt b/runtime/doc/usr_toc.txt
index 63242e3..0e3460f 100644
--- a/runtime/doc/usr_toc.txt
+++ b/runtime/doc/usr_toc.txt
@@ -273,9 +273,10 @@
 		|31.5|	Various
 
 |usr_32.txt|  The undo tree
-		|32.1|	Numbering changes
-		|32.2|	Jumping around the tree
-		|32.3|	Time travelling
+		|32.1|	Undo up to a file write
+		|32.2|	Numbering changes
+		|32.3|	Jumping around the tree
+		|32.4|	Time travelling
 
 ==============================================================================
 Tuning Vim ~