diff --git a/lib/linux/read.c b/lib/linux/read.c
index d91f81b2..a57cff4a 100644
--- a/lib/linux/read.c
+++ b/lib/linux/read.c
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2016,2017,2018,2019,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -27,7 +27,7 @@ ssize_t
 read (int filedes, void *buffer, size_t size)
 {
   long long_filedes = filedes;
-  ssize_t bytes = _sys_call3 (SYS_read, long_filedes, buffer, size);
+  ssize_t bytes = _sys_call3 (SYS_read, long_filedes, (long) buffer, (long) size);
   if (__mes_debug () > 4)
     {
       if (bytes == 1)
diff --git a/lib/linux/signal.c b/lib/linux/signal.c
index 23cf106d..1950f767 100644
--- a/lib/linux/signal.c
+++ b/lib/linux/signal.c
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2018,2019,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2018,2019,2022,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -36,7 +36,7 @@ sighandler_t
 signal (int signum, sighandler_t action)
 {
 #if __i386__
-  return _sys_call2 (SYS_signal, signum, action);
+  return (sighandler_t) _sys_call2 (SYS_signal, signum, (long) action);
 #else
   static struct sigaction setup_action = { 0 };
   static struct sigaction old = { 0 };
diff --git a/lib/stdio/vfscanf.c b/lib/stdio/vfscanf.c
index b1083a56..c18bd1d5 100644
--- a/lib/stdio/vfscanf.c
+++ b/lib/stdio/vfscanf.c
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2017,2018,2019,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -22,6 +22,7 @@
 #include <ctype.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int
 vfscanf (FILE * stream, char const *template, va_list ap)
@@ -76,7 +77,7 @@ vfscanf (FILE * stream, char const *template, va_list ap)
               ungetc (p, stream);
               *q = 0;
               q = buf;
-              *d = abtol (&q, 10);
+              *d = abtol ((char const**)&q, 10);
               count++;
               break;
             }
diff --git a/lib/stdlib/mbstowcs.c b/lib/stdlib/mbstowcs.c
index 543464b3..397fe603 100644
--- a/lib/stdlib/mbstowcs.c
+++ b/lib/stdlib/mbstowcs.c
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2018,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -30,6 +30,6 @@ mbstowcs (wchar_t * wstring, char const *string, size_t size)
   if (__mes_debug () && !stub)
     eputs ("mbstowcs stub\n");
   stub = 1;
-  strcpy (wstring, string);
+  strcpy ((char*)wstring, string);
   return strlen (string);
 }