--- a/re_search.c
+++ b/re_search.c
@@ -16,7 +16,7 @@
#ifdef REGEX
#include <sys/queue.h>
#include <sys/types.h>
-#include <regex.h>
+#include <pcre2posix.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>