diff --git a/misc-utils/look.1 b/misc-utils/look.1
index 2a514bae2..a9a7c4b3e 100644
--- a/misc-utils/look.1
+++ b/misc-utils/look.1
@@ -72,9 +72,9 @@ Options:
 .Bl -tag -width Ds
 .It Fl d
 Dictionary character set and order, i.e. only alphanumeric characters
-are compared.
+are compared. (On by default if no file specified).
 .It Fl f
-Ignore the case of alphabetic characters.
+Ignore the case of alphabetic characters. (On by default if no file specified).
 .It Fl a
 Use the alternate dictionary
 .Pa /usr/share/dict/web2