diff --git a/docs/index.html b/docs/index.html
index 7a5b88e3f..b47ed6a79 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1536,6 +1536,12 @@ To use a fileset, the todir attribute must be set.
| One of either file or
at least one nested fileset element. |
+
+ | preservelastmodified |
+ Give the copied files the same last modified
+ time as the original files. Defaults to "no". |
+ No |
+
| tofile |
The file to copy to. |