diff -ur a/hpwd.c b/hpwd.c
--- a/hpwd.c	2024-12-08 04:40:31.343764325 +0000
+++ b/hpwd.c	2024-12-08 04:40:45.768172918 +0000
@@ -24,6 +24,7 @@
 # endif
 
 # include <stdio.h>
+# include <string.h>
 
 # include "hfs.h"
 # include "hcwd.h"