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-rw-r--r--debug/fdelt_chk.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/debug/fdelt_chk.c b/debug/fdelt_chk.c
index 5e06f8f6a9..ded3f2f64c 100644
--- a/debug/fdelt_chk.c
+++ b/debug/fdelt_chk.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011 Free Software Foundation, Inc.
+/* Copyright (C) 2011, 2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -18,10 +18,10 @@
 #include <sys/select.h>
 
 
-unsigned long int
-__fdelt_chk (unsigned long int d)
+long int
+__fdelt_chk (long int d)
 {
-  if (d >= FD_SETSIZE)
+  if (d < 0 || d >= FD_SETSIZE)
     __chk_fail ();
 
   return d / __NFDBITS;