2 files changed, 5 insertions, 1 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 3e8b8519ba3..54985d33b59 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2012-12-08  Fabrice Popineau  <fabrice.popineau@gmail.com>
+
+        * w32fns.c (emacs_abort): Don't do arithmetics on void pointers.
+
 2012-12-08  Eli Zaretskii  <eliz@gnu.org>
 
         * w32.c (unsetenv, sys_putenv): New functions.
diff --git a/src/w32fns.c b/src/w32fns.c
index 6801fc68054..1a181079c82 100644
--- a/src/w32fns.c
+++ b/src/w32fns.c
@@ -7784,7 +7784,7 @@ emacs_abort (void)
                 /* stack[] gives the return addresses, whereas we want
                    the address of the call, so decrease each address
                    by approximate size of 1 CALL instruction.  */
-                sprintf (buf, "0x%p\r\n", stack[j] - sizeof(void *));
+                sprintf (buf, "0x%p\r\n", (char *)stack[j] - sizeof(void *));
                 if (stderr_fd >= 0)
                   write (stderr_fd, buf, strlen (buf));
                 if (errfile_fd >= 0)