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-rw-r--r--ace/Timer_List_T.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/ace/Timer_List_T.h b/ace/Timer_List_T.h
index e03e1cb5f2e..fa593d1642b 100644
--- a/ace/Timer_List_T.h
+++ b/ace/Timer_List_T.h
@@ -19,6 +19,10 @@
#include "ace/Timer_Queue_T.h"
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+#pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
// Forward declaration.
template <class TYPE, class FUNCTOR, class ACE_LOCK>
class ACE_Timer_List_T;