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-rw-r--r--nptl/pthread_mutex_destroy.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/nptl/pthread_mutex_destroy.c b/nptl/pthread_mutex_destroy.c
index 91ccfb0d29..2bf76a9da3 100644
--- a/nptl/pthread_mutex_destroy.c
+++ b/nptl/pthread_mutex_destroy.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -28,6 +28,9 @@ __pthread_mutex_destroy (mutex)
   if (mutex->__data.__nusers != 0)
     return EBUSY;
 
+  /* Set to an invalid value.  */
+  mutex->__data.__kind = -1;
+
   return 0;
 }
 strong_alias (__pthread_mutex_destroy, pthread_mutex_destroy)