diff --git a/supervisor/skel/sample.conf b/supervisor/skel/sample.conf
index cb5983c00..d046cb545 100644
--- a/supervisor/skel/sample.conf
+++ b/supervisor/skel/sample.conf
@@ -106,7 +106,7 @@ serverurl=unix:///tmp/supervisor.sock ; use a unix:// URL  for a unix socket
 ;stdout_logfile_backups=10     ; # of stdout logfile backups (0 means none, default 10)
 ;stdout_capture_maxbytes=1MB   ; number of bytes in 'capturemode' (default 0)
 ;stdout_prepend_timestamp=true ; prepend timestamp to stdout log file (default false)
-;stdout_prepend_timestamp_format=%%Y-%%m-%%d %%H:%%M:%%S; customise prepend timestamp to stdout log file (default false)
+;stdout_prepend_timestamp_format=%%Y-%%m-%%d %%H:%%M:%%S; customise prepend timestamp to stdout log file (default %%Y-%%m-%%d %%H:%%M:%%S)
 ;stdout_events_enabled=false   ; emit events on stdout writes (default false)
 ;stdout_syslog=false           ; send stdout to syslog with process name (default false)
 ;stderr_logfile=/a/path        ; stderr log path, NONE for none; default AUTO
@@ -114,7 +114,7 @@ serverurl=unix:///tmp/supervisor.sock ; use a unix:// URL  for a unix socket
 ;stderr_logfile_backups=10     ; # of stderr logfile backups (0 means none, default 10)
 ;stderr_capture_maxbytes=1MB   ; number of bytes in 'capturemode' (default 0)
 ;stderr_prepend_timestamp=true ; prepend timestamp to stderr log file (default false)
-;stderr_prepend_timestamp_format=%%Y-%%m-%%d %%H:%%M:%%S; customise prepend timestamp to stdout log file (default false)
+;stderr_prepend_timestamp_format=%%Y-%%m-%%d %%H:%%M:%%S; customise prepend timestamp to stderr log file (default %%Y-%%m-%%d %%H:%%M:%%S)
 ;stderr_events_enabled=false   ; emit events on stderr writes (default false)
 ;stderr_syslog=false           ; send stderr to syslog with process name (default false)
 ;environment=A="1",B="2"       ; process environment additions (def no adds)