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-rw-r--r--ace/config-hpux-10.x.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/ace/config-hpux-10.x.h b/ace/config-hpux-10.x.h
index 8d6f4830bca..9cb0f51397c 100644
--- a/ace/config-hpux-10.x.h
+++ b/ace/config-hpux-10.x.h
@@ -145,7 +145,9 @@ extern int h_errno; /* This isn't declared in a header file on HP-UX */
////////////////////////////////////////////////////////////////////////
#ifdef _ACE_HPUX_USE_DCETHREADS
-# define ACE_MT_SAFE
+# if !defined (ACE_MT_SAFE)
+ #define ACE_MT_SAFE 1
+# endif
# define ACE_HAS_THREADS
# define ACE_HAS_DCETHREADS
# define ACE_HAS_DCE_DRAFT4_THREADS