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-rw-r--r--ace/Future.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/ace/Future.h b/ace/Future.h
index 4677fcd164d..7d0aa301a8b 100644
--- a/ace/Future.h
+++ b/ace/Future.h
@@ -21,6 +21,10 @@
#include "ace/Synch.h"
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+#pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
#if defined (ACE_HAS_THREADS)
// Forward decl.