diff --git a/SftpFrontend.md b/SftpFrontend.md
index 3c19f07..59a172b 100644
--- a/SftpFrontend.md
+++ b/SftpFrontend.md
@@ -22,7 +22,7 @@ Since Tahoe uses capability access control rather than Unix-style permissions, t
 
 See the last section of [FTP-and-SFTP.txt]source:docs/frontends/FTP-and-SFTP.txt for information on how the SFTP frontend treats immutable and mutable files.
 
-The '`ctime`' and '`mtime`' attributes will always be the same, and are set from the Tahoe `linkmotime` timestamp, which is changed only when the link from the parent directory is modified (see the 'About the metadata' section of [webapi.txt]source:doc/frontends/webapi.txt). These fields are not updated when a mutable file is changed.
+The '`ctime`' and '`mtime`' attributes will always be the same, and are set from the Tahoe `linkmotime` timestamp, which is changed only when the link from the parent directory is modified (see the 'About the metadata' section of [webapi.txt]source:doc/frontends/webapi.txt). These fields are not updated when the contents of a mutable file are changed.
 
 
 ### sshfs