thodg/got

diff --git a/tog/tog.1 b/tog/tog.1
index 379342d..de39131 100644
--- a/tog/tog.1
+++ b/tog/tog.1
@@ -108,6 +108,8 @@ Show log entries for the parent directory of the currently selected path.
 Prompt for a search pattern and start searching for matching commits.
 The search pattern is an extended regular expression which is matched
 against a commit's author name, committer name, and log message.
+Regular expression syntax is documented in
+.Xr re_format 7 .
 .It Cm n
 Find the next commit which matches the current search pattern.
 .It Cm N