--- mandoc-1.14.5/dbm_map.c.orig	Sat Jan 25 20:09:42 2020
+++ mandoc-1.14.5/dbm_map.c	Sat Jan 25 20:09:49 2020
@@ -36,7 +36,7 @@
 #endif
 #include <errno.h>
 #include <fcntl.h>
-#include <regex.h>
+#include <pcre2posix.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>