1 files changed, 5 insertions, 1 deletions

diff --git a/contrib/amd/libamu/xutil.c b/contrib/amd/libamu/xutil.c
index 5ba4938f9ae7..bd1bcf576ef5 100644
--- a/contrib/amd/libamu/xutil.c
+++ b/contrib/amd/libamu/xutil.c
@@ -422,13 +422,17 @@ real_plog(int lvl, char *fmt, va_list vargs)
 
   expand_error(fmt, efmt, 1024);
 
+#ifdef HAVE_VSNPRINTF
+  vsnprintf(ptr, 1024, efmt, vargs);
+#else /* not HAVE_VSNPRINTF */
   /*
    * XXX: ptr is 1024 bytes long.  It is possible to write into it
    * more than 1024 bytes, if efmt is already large, and vargs expand
-   * as well.
+   * as well.  This is not as safe as using vsnprintf().
    */
   vsprintf(ptr, efmt, vargs);
   msg[1023] = '\0';		/* null terminate, to be sure */
+#endif /* not HAVE_VSNPRINTF */
 
   ptr += strlen(ptr);
   if (ptr[-1] == '\n')