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-rw-r--r--string/swab.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/string/swab.c b/string/swab.c
index 9d7858cf96..c9cf7004ea 100644
--- a/string/swab.c
+++ b/string/swab.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992, 1996 Free Software Foundation, Inc.
+/* Copyright (C) 1992, 1996, 1997 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
@@ -21,6 +21,7 @@
 void
 swab (const char *from, char *to, ssize_t n)
 {
+  n &= ~((ssize_t) 1);
   while (n > 1)
     {
       const char b0 = from[--n], b1 = from[--n];