diff --git a/man/dkimpy-milter.8 b/man/dkimpy-milter.8
index 0900c4f..3005ad3 100644
--- a/man/dkimpy-milter.8
+++ b/man/dkimpy-milter.8
@@ -170,6 +170,16 @@ are ignored, and the hash ("#") character denotes the start of a comment.
 If a value contains multiple entries, the entries should be separated by
 colons.
 .TP
+.I b)
+If the string begins with "refile:", then the remainder of the string is
+presumed to specify a file that contains a set of patterns, one per line,
+and their associated values.  The pattern is taken as the start of the line
+to the first whitespace, and the portion after that whitespace is taken as
+the value to be used when that pattern is matched.  Patterns are simple
+wildcard patterns, matching all text except that the asterisk ("*") character
+is considered a wildcard.  If a value contains multiple entries, the entries
+should be separated by colons.
+.TP
 .I c)
 If the string begins with "db:" and the program was compiled with
 Sleepycat DB support, then the remainder of the string is presumed to