diff --git a/debug/segfault.c b/debug/segfault.c
index 0a6be8b9d4..1873022db9 100644
--- a/debug/segfault.c
+++ b/debug/segfault.c
@@ -58,7 +58,7 @@ write_strsignal (int fd, int signal)
   char buf[30];
   char *ptr = _itoa_word (signal, &buf[sizeof (buf)], 10, 0);
   WRITE_STRING ("signal ");
-  write (fd, buf, &buf[sizeof (buf)] - ptr);
+  write (fd, ptr, &buf[sizeof (buf)] - ptr);
 }