--- heirloom-ng-clean/libcommon/prerror.c	2024-12-12 19:06:27.358195016 +0300
+++ heirloom-ng/libcommon/prerror.c	2024-12-12 16:52:25.531354406 +0300
@@ -7,6 +7,7 @@
  * SPDX-Licence-Identifier: Zlib
  */
 
+#include <string.h>
 #include <errno.h>
 #include "pfmt.h"