diff --git a/docs/xftp-server.html b/docs/xftp-server.html
index 59ab663f96..94503849a4 100644
--- a/docs/xftp-server.html
+++ b/docs/xftp-server.html
@@ -811,7 +811,7 @@ User=xftp
 Group=xftp
 Type=simple
 ExecStart=/usr/local/bin/xftp-server start +RTS -N -RTS
-ExecStopPost=/usr/bin/env sh -c '[ -e "/var/opt/simplex-xftp/file-server-store.log" ] && cp "/var/opt/simplex-xftp/file-server-store.log" "/var/opt/simplex-xftp/file-server-store.log.$(date +'%FT%T')"'
+ExecStopPost=/usr/bin/env sh -c '[ -e "/var/opt/simplex-xftp/file-server-store.log" ] && cp "/var/opt/simplex-xftp/file-server-store.log" "/var/opt/simplex-xftp/file-server-store.log.$(date +'%%FT%%T')"'
 LimitNOFILE=65535
 KillSignal=SIGINT
 TimeoutStopSec=infinity