1 files changed, 3 insertions, 1 deletions
diff --git a/regex.h b/regex.h
index 2386d2daa8..48696e0ee4 100644
--- a/regex.h
+++ b/regex.h
@@ -69,8 +69,10 @@
 #define RE_OPTION_IGNORECASE (1L)
 /* perl-style extended pattern available */
 #define RE_OPTION_EXTENDED   (RE_OPTION_IGNORECASE<<1)
-/* newline will be included for . and invert charclass matches */
+/* newline will be included for ., ^, $ does not handle newline - obsolete */
 #define RE_OPTION_POSIXLINE  (RE_OPTION_EXTENDED<<1)
+/* newline will be included for . */
+#define RE_OPTION_MULTILINE  (RE_OPTION_POSIXLINE<<1)
 /* search for longest match, in accord with POSIX regexp */
 #define RE_OPTION_LONGEST    (RE_OPTION_POSIXLINE<<1)