diff --git a/gnu/dist/texinfo/makeinfo/sectioning.c b/gnu/dist/texinfo/makeinfo/sectioning.c
index e8f202ed700b..73f21e0d84df 100644
--- a/gnu/dist/texinfo/makeinfo/sectioning.c
+++ b/gnu/dist/texinfo/makeinfo/sectioning.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: sectioning.c,v 1.1.1.5 2008/09/02 07:50:20 christos Exp $	*/
+/*	$NetBSD: sectioning.c,v 1.2 2011/05/11 23:20:46 joerg Exp $	*/
 
 /* sectioning.c -- for @chapter, @section, ..., @contents ...
    Id: sectioning.c,v 1.25 2004/07/05 22:23:23 karl Exp
@@ -258,14 +258,13 @@ current_chapter_number (void)
     return xstrdup ("");
   else if (enum_marker == APPENDIX_MAGIC)
     {
-      char s[1];
-      sprintf (s, "%c", numbers[0] + 64);
+      char s[2] = { numbers[0] + 64, '\0' };
       return xstrdup (s);
     }
   else
     {
-      char s[5];
-      sprintf (s, "%d", numbers[0]);
+      char s[11];
+      snprintf (s, sizeof(s), "%d", numbers[0]);
       return xstrdup (s);
     }
 }