diff --git a/libutil/find.h b/libutil/find.h
index 45e3603..519a1ba 100644
--- a/libutil/find.h
+++ b/libutil/find.h
@@ -21,6 +21,12 @@
 #ifndef _FIND_H_
 #define _FIND_H_
 
+#ifndef PATH_MAX
+/* Since this platform does not have PATH_MAX, you should define it
+   using an appropriate value for the platform. */
+/* #define PATH_MAX     1024 */
+#endif
+
 void set_accept_dotfiles(void);
 void set_skip_unreadable(void);
 int skipthisfile(const char *);