1 files changed, 1 insertions, 1 deletions
diff --git a/ace/OS.i b/ace/OS.i
index d5ec4647288..64279d39521 100644
--- a/ace/OS.i
+++ b/ace/OS.i
@@ -3664,7 +3664,7 @@ ACE_OS::thr_cancel (ACE_thread_t thr_id)
   // I didn't manage to find pthread_cancel anywhere int the MIT
   // pthread implementation. So I'll just leave this instead, and
   // see what breaks. -- jwr
-  ACE_UNUSED_ARG (t_id);
+  ACE_UNUSED_ARG (thr_id);
   ACE_NOTSUP_RETURN (-1);
 #elif defined (ACE_HAS_STHREADS)
   ACE_NOTSUP_RETURN (-1);